diff --git a/mercurial/obsutil.py b/mercurial/obsutil.py
--- a/mercurial/obsutil.py
+++ b/mercurial/obsutil.py
@@ -822,15 +822,16 @@ def obsfateprinter(successors, markers, 
     # Date
     dates = markersdates(markers)
 
-    min_date = min(dates)
-    max_date = max(dates)
+    if verbose:
+        min_date = min(dates)
+        max_date = max(dates)
 
-    if min_date == max_date:
-        fmtmin_date = util.datestr(min_date, '%Y-%m-%d %H:%M %1%2')
-        line.append(" (at %s)" % fmtmin_date)
-    else:
-        fmtmin_date = util.datestr(min_date, '%Y-%m-%d %H:%M %1%2')
-        fmtmax_date = util.datestr(max_date, '%Y-%m-%d %H:%M %1%2')
-        line.append(" (between %s and %s)" % (fmtmin_date, fmtmax_date))
+        if min_date == max_date:
+            fmtmin_date = util.datestr(min_date, '%Y-%m-%d %H:%M %1%2')
+            line.append(" (at %s)" % fmtmin_date)
+        else:
+            fmtmin_date = util.datestr(min_date, '%Y-%m-%d %H:%M %1%2')
+            fmtmax_date = util.datestr(max_date, '%Y-%m-%d %H:%M %1%2')
+            line.append(" (between %s and %s)" % (fmtmin_date, fmtmax_date))
 
     return "".join(line)
diff --git a/tests/test-obsmarker-template.t b/tests/test-obsmarker-template.t
--- a/tests/test-obsmarker-template.t
+++ b/tests/test-obsmarker-template.t
@@ -100,7 +100,7 @@ Predecessors template should show curren
   o  d004c8f274b9
   |
   | @  471f378eab4c
-  |/     Obsfate: rewritten using amend as 3:d004c8f274b9 by test, test2 (between 2001-04-19 04:25 +0000 and 2009-02-13 23:31 +0000)
+  |/     Obsfate: rewritten using amend as 3:d004c8f274b9 by test, test2
   o  ea207398892e
   
   $ hg up 'desc(A1)' --hidden
@@ -219,18 +219,18 @@ Check other fatelog implementations
   @  d004c8f274b9
   |
   | x  a468dc9b3633
-  |/     Obsfate: rewritten using amend as 3:d004c8f274b9 (at 2001-04-19 04:25 +0000)
+  |/     Obsfate: rewritten using amend as 3:d004c8f274b9
   | x  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:a468dc9b3633 (at 2009-02-13 23:31 +0000)
+  |/     Obsfate: rewritten using amend as 2:a468dc9b3633
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   @  d004c8f274b9
   |
   | x  a468dc9b3633
-  |/     Obsfate: rewritten using amend as 3:d004c8f274b9 by test2 (at 2001-04-19 04:25 +0000)
+  |/     Obsfate: rewritten using amend as 3:d004c8f274b9 by test2
   | x  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:a468dc9b3633 (at 2009-02-13 23:31 +0000)
+  |/     Obsfate: rewritten using amend as 2:a468dc9b3633
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -394,7 +394,7 @@ Check other fatelog implementations
   o  337fec4d2edc
   |
   | x  471597cad322
-  |/     Obsfate: split as 2:337fec4d2edc, 3:f257fde29c7a (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: split as 2:337fec4d2edc, 3:f257fde29c7a
   o  ea207398892e
   
   $ hg fatelogkw --hidden
@@ -403,7 +403,7 @@ Check other fatelog implementations
   o  337fec4d2edc
   |
   | x  471597cad322
-  |/     Obsfate: split as 2:337fec4d2edc, 3:f257fde29c7a (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: split as 2:337fec4d2edc, 3:f257fde29c7a
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -594,18 +594,18 @@ Check other fatelog implementations
   @  eb5a0daa2192
   |
   | x  0dec01379d3b
-  | |    Obsfate: rewritten as 3:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 3:eb5a0daa2192
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 3:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 3:eb5a0daa2192
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   @  eb5a0daa2192
   |
   | x  0dec01379d3b
-  | |    Obsfate: rewritten as 3:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 3:eb5a0daa2192
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 3:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 3:eb5a0daa2192
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -824,24 +824,24 @@ Check other fatelog implementations
   o  019fadeab383
   |
   | x  65b757b745b9
-  |/     Obsfate: rewritten using amend as 4:019fadeab383 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 4:019fadeab383
   | @  fdf9bde5129a
   |/
   | x  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a (at 1970-01-01 00:00 +0000)
-  |      Obsfate: rewritten using amend as 3:65b757b745b9 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a
+  |      Obsfate: rewritten using amend as 3:65b757b745b9
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   o  019fadeab383
   |
   | x  65b757b745b9
-  |/     Obsfate: rewritten using amend as 4:019fadeab383 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 4:019fadeab383
   | @  fdf9bde5129a
   |/
   | x  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a (at 1970-01-01 00:00 +0000)
-  |      Obsfate: rewritten using amend as 3:65b757b745b9 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a
+  |      Obsfate: rewritten using amend as 3:65b757b745b9
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -1095,22 +1095,22 @@ Check other fatelog implementations
   @  eb5a0daa2192
   |
   | x  b7ea6d14e664
-  | |    Obsfate: rewritten as 4:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 4:eb5a0daa2192
   | | x  0dec01379d3b
-  | |/     Obsfate: rewritten using amend as 3:b7ea6d14e664 (at 1970-01-01 00:00 +0000)
+  | |/     Obsfate: rewritten using amend as 3:b7ea6d14e664
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 4:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 4:eb5a0daa2192
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   @  eb5a0daa2192
   |
   | x  b7ea6d14e664
-  | |    Obsfate: rewritten as 4:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 4:eb5a0daa2192
   | | x  0dec01379d3b
-  | |/     Obsfate: rewritten using amend as 3:b7ea6d14e664 (at 1970-01-01 00:00 +0000)
+  | |/     Obsfate: rewritten using amend as 3:b7ea6d14e664
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 4:eb5a0daa2192 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 4:eb5a0daa2192
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -1282,14 +1282,14 @@ Check other fatelog implementations
   @  7a230b46bf61
   |
   | x  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:7a230b46bf61 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 2:7a230b46bf61
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   @  7a230b46bf61
   |
   | x  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:7a230b46bf61 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 2:7a230b46bf61
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -1445,20 +1445,20 @@ Check other fatelog implementations
   o  f897c6137566
   |
   | x  0dec01379d3b
-  | |    Obsfate: rewritten as 3:f897c6137566 (at 1970-01-01 00:00 +0000)
-  | |    Obsfate: rewritten as 1:471f378eab4c (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 3:f897c6137566
+  | |    Obsfate: rewritten as 1:471f378eab4c
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 2:0dec01379d3b (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 2:0dec01379d3b
   @  ea207398892e
   
   $ hg fatelogkw --hidden
   o  f897c6137566
   |
   | x  0dec01379d3b
-  | |    Obsfate: rewritten as 3:f897c6137566 (at 1970-01-01 00:00 +0000)
-  | |    Obsfate: rewritten as 1:471f378eab4c (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 3:f897c6137566
+  | |    Obsfate: rewritten as 1:471f378eab4c
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 2:0dec01379d3b (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 2:0dec01379d3b
   @  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -1832,21 +1832,21 @@ Check other fatelog implementations
   o |  b18bc8331526
   |/
   | x  ba2ed02b0c9a
-  | |    Obsfate: rewritten using rebase as 10:eceed8f98ffc (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten using rebase as 10:eceed8f98ffc
   | x  4a004186e638
-  |/     Obsfate: rewritten using amend as 8:b18bc8331526 (at 1970-01-01 00:00 +0000)
-  |      Obsfate: rewritten using amend as 9:0b997eb7ceee (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 8:b18bc8331526
+  |      Obsfate: rewritten using amend as 9:0b997eb7ceee
   o  dd800401bd8c
   |
   | @  9bd10a0775e4
-  |/     Obsfate: split as 5:dd800401bd8c, 6:4a004186e638, 7:ba2ed02b0c9a (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: split as 5:dd800401bd8c, 6:4a004186e638, 7:ba2ed02b0c9a
   o  f897c6137566
   |
   | x  0dec01379d3b
-  | |    Obsfate: rewritten as 3:f897c6137566 (at 1970-01-01 00:00 +0000)
-  | |    Obsfate: rewritten as 1:471f378eab4c (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 3:f897c6137566
+  | |    Obsfate: rewritten as 1:471f378eab4c
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 2:0dec01379d3b (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 2:0dec01379d3b
   o  ea207398892e
   
   $ hg fatelogkw --hidden
@@ -1857,21 +1857,21 @@ Check other fatelog implementations
   o |  b18bc8331526
   |/
   | x  ba2ed02b0c9a
-  | |    Obsfate: rewritten using rebase as 10:eceed8f98ffc (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten using rebase as 10:eceed8f98ffc
   | x  4a004186e638
-  |/     Obsfate: rewritten using amend as 8:b18bc8331526 (at 1970-01-01 00:00 +0000)
-  |      Obsfate: rewritten using amend as 9:0b997eb7ceee (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 8:b18bc8331526
+  |      Obsfate: rewritten using amend as 9:0b997eb7ceee
   o  dd800401bd8c
   |
   | @  9bd10a0775e4
-  |/     Obsfate: split as 5:dd800401bd8c, 6:4a004186e638, 7:ba2ed02b0c9a (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: split as 5:dd800401bd8c, 6:4a004186e638, 7:ba2ed02b0c9a
   o  f897c6137566
   |
   | x  0dec01379d3b
-  | |    Obsfate: rewritten as 3:f897c6137566 (at 1970-01-01 00:00 +0000)
-  | |    Obsfate: rewritten as 1:471f378eab4c (at 1970-01-01 00:00 +0000)
+  | |    Obsfate: rewritten as 3:f897c6137566
+  | |    Obsfate: rewritten as 1:471f378eab4c
   | x  471f378eab4c
-  |/     Obsfate: rewritten as 2:0dec01379d3b (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten as 2:0dec01379d3b
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -1977,22 +1977,22 @@ Check other fatelog implementations
 
   $ hg fatelogkw --hidden -q
   x  65b757b745b9
-  |    Obsfate: pruned (at 1970-01-01 00:00 +0000)
+  |    Obsfate: pruned
   | x  fdf9bde5129a
-  |/     Obsfate: pruned (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: pruned
   | @  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a (at 1970-01-01 00:00 +0000)
-  |      Obsfate: rewritten using amend as 3:65b757b745b9 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a
+  |      Obsfate: rewritten using amend as 3:65b757b745b9
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   x  65b757b745b9
-  |    Obsfate: pruned (at 1970-01-01 00:00 +0000)
+  |    Obsfate: pruned
   | x  fdf9bde5129a
-  |/     Obsfate: pruned (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: pruned
   | @  471f378eab4c
-  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a (at 1970-01-01 00:00 +0000)
-  |      Obsfate: rewritten using amend as 3:65b757b745b9 (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: rewritten using amend as 2:fdf9bde5129a
+  |      Obsfate: rewritten using amend as 3:65b757b745b9
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
@@ -2101,20 +2101,20 @@ Check other fatelog implementations
 
   $ hg fatelogkw --hidden -q
   @  0d0ef4bdf70e
-  |    Obsfate: pruned (at 1970-01-01 00:00 +0000)
+  |    Obsfate: pruned
   o  617adc3a144c
   |
   | x  471597cad322
-  |/     Obsfate: split as 2:617adc3a144c, 3:0d0ef4bdf70e (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: split as 2:617adc3a144c, 3:0d0ef4bdf70e
   o  ea207398892e
   
   $ hg fatelogkw --hidden
   @  0d0ef4bdf70e
-  |    Obsfate: pruned (at 1970-01-01 00:00 +0000)
+  |    Obsfate: pruned
   o  617adc3a144c
   |
   | x  471597cad322
-  |/     Obsfate: split as 2:617adc3a144c, 3:0d0ef4bdf70e (at 1970-01-01 00:00 +0000)
+  |/     Obsfate: split as 2:617adc3a144c, 3:0d0ef4bdf70e
   o  ea207398892e
   
   $ hg fatelogkw --hidden -v
diff --git a/tests/test-obsolete-divergent.t b/tests/test-obsolete-divergent.t
--- a/tests/test-obsolete-divergent.t
+++ b/tests/test-obsolete-divergent.t
@@ -66,7 +66,7 @@ A_1 have two direct and divergent succes
   |
   | o  2:82623d38b9ba A_1
   |/
-  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba (at 1970-01-01 00:00 +0000); rewritten as 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da]
   |/
   @  0:d20a80d4def3 base
   
@@ -127,11 +127,11 @@ indirect divergence with known changeset
   $ hg log -G --hidden
   @  4:01f36c5a8fda A_3
   |
-  | x  3:392fd25390da A_2 [rewritten as 4:01f36c5a8fda (at 1970-01-01 00:00 +0000)]
+  | x  3:392fd25390da A_2 [rewritten as 4:01f36c5a8fda]
   |/
   | o  2:82623d38b9ba A_1
   |/
-  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba (at 1970-01-01 00:00 +0000); rewritten as 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da]
   |/
   o  0:d20a80d4def3 base
   
@@ -185,7 +185,7 @@ indirect divergence with known changeset
   |
   | o  2:82623d38b9ba A_1
   |/
-  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba (at 1970-01-01 00:00 +0000); rewritten as 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da]
   |/
   @  0:d20a80d4def3 base
   
@@ -259,11 +259,11 @@ divergence that converge again is not di
   $ hg log -G --hidden
   @  4:01f36c5a8fda A_3
   |
-  | x  3:392fd25390da A_2 [rewritten as 4:01f36c5a8fda (at 1970-01-01 00:00 +0000)]
+  | x  3:392fd25390da A_2 [rewritten as 4:01f36c5a8fda]
   |/
-  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda (at 1970-01-01 00:00 +0000)]
+  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda]
   |/
-  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba (at 1970-01-01 00:00 +0000); rewritten as 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [rewritten as 2:82623d38b9ba; rewritten as 3:392fd25390da]
   |/
   o  0:d20a80d4def3 base
   
@@ -309,7 +309,7 @@ split is not divergences
   |
   | o  2:82623d38b9ba A_1
   |/
-  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da]
   |/
   @  0:d20a80d4def3 base
   
@@ -361,15 +361,15 @@ Even when subsequent rewriting happen
   $ hg log -G --hidden
   @  6:e442cfc57690 A_5
   |
-  | x  5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690 (at 1970-01-01 00:00 +0000)]
+  | x  5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690]
   |/
   | o  4:01f36c5a8fda A_3
   |/
-  | x  3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a (at 1970-01-01 00:00 +0000)]
+  | x  3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a]
   |/
-  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda (at 1970-01-01 00:00 +0000)]
+  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda]
   |/
-  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da]
   |/
   o  0:d20a80d4def3 base
   
@@ -437,19 +437,19 @@ Check more complex obsolescence graft (w
   |/
   | o  8:7ae126973a96 A_7
   |/
-  | x  7:3750ebee865d B_0 [rewritten as 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  7:3750ebee865d B_0 [rewritten as 3:392fd25390da]
   | |
-  | x  6:e442cfc57690 A_5 [rewritten as 10:bed64f5d2f5a (at 1970-01-01 00:00 +0000); split as 8:7ae126973a96, 9:14608b260df8 (at 1970-01-01 00:00 +0000)]
+  | x  6:e442cfc57690 A_5 [rewritten as 10:bed64f5d2f5a; split as 8:7ae126973a96, 9:14608b260df8]
   |/
-  | x  5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690 (at 1970-01-01 00:00 +0000)]
+  | x  5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690]
   |/
   | o  4:01f36c5a8fda A_3
   |/
-  | x  3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a (at 1970-01-01 00:00 +0000)]
+  | x  3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a]
   |/
-  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda (at 1970-01-01 00:00 +0000)]
+  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda]
   |/
-  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da]
   |/
   @  0:d20a80d4def3 base
   
@@ -535,25 +535,25 @@ fix the divergence
   $ hg log -G --hidden
   o  11:a139f71be9da A_A
   |
-  | x  10:bed64f5d2f5a A_9 [rewritten as 11:a139f71be9da (at 1970-01-01 00:00 +0000)]
+  | x  10:bed64f5d2f5a A_9 [rewritten as 11:a139f71be9da]
   |/
-  | x  9:14608b260df8 A_8 [rewritten as 11:a139f71be9da (at 1970-01-01 00:00 +0000)]
+  | x  9:14608b260df8 A_8 [rewritten as 11:a139f71be9da]
   |/
-  | x  8:7ae126973a96 A_7 [rewritten as 11:a139f71be9da (at 1970-01-01 00:00 +0000)]
+  | x  8:7ae126973a96 A_7 [rewritten as 11:a139f71be9da]
   |/
-  | x  7:3750ebee865d B_0 [rewritten as 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  7:3750ebee865d B_0 [rewritten as 3:392fd25390da]
   | |
-  | x  6:e442cfc57690 A_5 [rewritten as 10:bed64f5d2f5a (at 1970-01-01 00:00 +0000); split as 8:7ae126973a96, 9:14608b260df8 (at 1970-01-01 00:00 +0000)]
+  | x  6:e442cfc57690 A_5 [rewritten as 10:bed64f5d2f5a; split as 8:7ae126973a96, 9:14608b260df8]
   |/
-  | x  5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690 (at 1970-01-01 00:00 +0000)]
+  | x  5:6a411f0d7a0a A_4 [rewritten as 6:e442cfc57690]
   |/
   | o  4:01f36c5a8fda A_3
   |/
-  | x  3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a (at 1970-01-01 00:00 +0000)]
+  | x  3:392fd25390da A_2 [rewritten as 5:6a411f0d7a0a]
   |/
-  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda (at 1970-01-01 00:00 +0000)]
+  | x  2:82623d38b9ba A_1 [rewritten as 4:01f36c5a8fda]
   |/
-  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da (at 1970-01-01 00:00 +0000)]
+  | x  1:007dc284c1f8 A_0 [split as 2:82623d38b9ba, 3:392fd25390da]
   |/
   @  0:d20a80d4def3 base
   
diff --git a/tests/test-obsolete.t b/tests/test-obsolete.t
--- a/tests/test-obsolete.t
+++ b/tests/test-obsolete.t
@@ -159,9 +159,9 @@ check that heads does not report them
   5:5601fb93a350 (draft) [tip ] add new_3_c
   $ hg heads --hidden
   5:5601fb93a350 (draft) [tip ] add new_3_c
-  4:ca819180edb9 (draft *obsolete*) [ ] add new_2_c [rewritten as 5:5601fb93a350 (between 1970-01-01 00:22 +0000 and 1970-01-01 00:22 +0000)]
-  3:cdbce2fbb163 (draft *obsolete*) [ ] add new_c [rewritten as 4:ca819180edb9 (at 1970-01-01 00:22 +0000)]
-  2:245bde4270cd (draft *obsolete*) [ ] add original_c [rewritten as 3:cdbce2fbb163 (at 1970-01-01 00:00 -0002)]
+  4:ca819180edb9 (draft *obsolete*) [ ] add new_2_c [rewritten as 5:5601fb93a350]
+  3:cdbce2fbb163 (draft *obsolete*) [ ] add new_c [rewritten as 4:ca819180edb9]
+  2:245bde4270cd (draft *obsolete*) [ ] add original_c [rewritten as 3:cdbce2fbb163]
 
 
 check that summary does not report them
@@ -277,11 +277,11 @@ Basic exclusive testing
   $ hg log -G --hidden
   @  6:6f9641995072 (draft) [tip ] add n3w_3_c
   |
-  | x  5:5601fb93a350 (draft *obsolete*) [ ] add new_3_c [rewritten as 6:6f9641995072 (at 1970-01-01 00:22 +0000)]
+  | x  5:5601fb93a350 (draft *obsolete*) [ ] add new_3_c [rewritten as 6:6f9641995072]
   |/
-  | x  4:ca819180edb9 (draft *obsolete*) [ ] add new_2_c [rewritten as 5:5601fb93a350 (between 1970-01-01 00:22 +0000 and 1970-01-01 00:22 +0000)]
+  | x  4:ca819180edb9 (draft *obsolete*) [ ] add new_2_c [rewritten as 5:5601fb93a350]
   |/
-  | x  3:cdbce2fbb163 (draft *obsolete*) [ ] add new_c [rewritten as 4:ca819180edb9 (at 1970-01-01 00:22 +0000)]
+  | x  3:cdbce2fbb163 (draft *obsolete*) [ ] add new_c [rewritten as 4:ca819180edb9]
   |/
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
@@ -435,11 +435,11 @@ clone support
   $ hg -R clone-dest log -G --hidden
   @  6:6f9641995072 (draft) [tip ] add n3w_3_c
   |
-  | x  5:5601fb93a350 (draft *obsolete*) [ ] add new_3_c [rewritten as 6:6f9641995072 (at 1970-01-01 00:22 +0000)]
+  | x  5:5601fb93a350 (draft *obsolete*) [ ] add new_3_c [rewritten as 6:6f9641995072]
   |/
-  | x  4:ca819180edb9 (draft *obsolete*) [ ] add new_2_c [rewritten as 5:5601fb93a350 (between 1970-01-01 00:22 +0000 and 1970-01-01 00:22 +0000)]
+  | x  4:ca819180edb9 (draft *obsolete*) [ ] add new_2_c [rewritten as 5:5601fb93a350]
   |/
-  | x  3:cdbce2fbb163 (draft *obsolete*) [ ] add new_c [rewritten as 4:ca819180edb9 (at 1970-01-01 00:22 +0000)]
+  | x  3:cdbce2fbb163 (draft *obsolete*) [ ] add new_c [rewritten as 4:ca819180edb9]
   |/
   | o  2:245bde4270cd (public) [ ] add original_c
   |/
@@ -520,7 +520,7 @@ detect outgoing obsolete and unstable
   $ hg debugobsolete | grep `getid original_d`
   94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   $ hg log -r 'obsolete()'
-  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned (at 1970-01-01 00:00 +0000)]
+  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned]
   $ hg summary
   parent: 5:cda648ca50f5 tip (orphan)
    add original_e
@@ -532,7 +532,7 @@ detect outgoing obsolete and unstable
   $ hg log -G -r '::orphan()'
   @  5:cda648ca50f5 (draft orphan) [tip ] add original_e
   |
-  x  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned (at 1970-01-01 00:00 +0000)]
+  x  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned]
   |
   o  3:6f9641995072 (draft) [ ] add n3w_3_c
   |
@@ -571,7 +571,7 @@ Don't try to push extinct changeset
   1:7c3bad9141dc (public) [ ] add b
   2:245bde4270cd (public) [ ] add original_c
   3:6f9641995072 (draft) [ ] add n3w_3_c
-  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned (at 1970-01-01 00:00 +0000)]
+  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned]
   5:cda648ca50f5 (draft orphan) [tip ] add original_e
   $ hg push ../tmpf -f # -f because be push unstable too
   pushing to ../tmpf
@@ -595,7 +595,7 @@ Do not warn about new head when the new 
   $ hg log -G
   @  5:cda648ca50f5 (draft orphan) [tip ] add original_e
   |
-  x  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned (at 1970-01-01 00:00 +0000)]
+  x  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned]
   |
   o  3:6f9641995072 (draft) [ ] add n3w_3_c
   |
@@ -636,9 +636,9 @@ Reminder of the repo situation
   $ hg log --hidden --graph
   @  6:3de5eca88c00 (draft) [tip ] add obsolete_e
   |
-  | x  5:cda648ca50f5 (draft *obsolete*) [ ] add original_e [rewritten as 6:3de5eca88c00 by test <test@example.net> (at 1970-01-01 00:00 +0000)]
+  | x  5:cda648ca50f5 (draft *obsolete*) [ ] add original_e [rewritten as 6:3de5eca88c00 by test <test@example.net>]
   | |
-  | x  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned (at 1970-01-01 00:00 +0000)]
+  | x  4:94b33453f93b (draft *obsolete*) [ ] add original_d [pruned]
   |/
   o  3:6f9641995072 (draft) [ ] add n3w_3_c
   |
@@ -928,7 +928,7 @@ Several troubles on the same changeset (
 test the "obsolete" templatekw
 
   $ hg log -r 'obsolete()'
-  6:3de5eca88c00 (draft *obsolete*) [ ] add obsolete_e [pruned (at 1970-01-01 00:00 +0000)]
+  6:3de5eca88c00 (draft *obsolete*) [ ] add obsolete_e [pruned]
 
 test the "troubles" templatekw
 
@@ -1098,7 +1098,7 @@ Test that a local tag blocks a changeset
   $ hg log -G
   @  2:323a9c3ddd91 (draft) [tip ] A
   |
-  | x  1:29f0c6921ddd (draft *obsolete*) [visible ] A [rewritten using amend as 2:323a9c3ddd91 (at 1970-01-01 00:00 +0000)]
+  | x  1:29f0c6921ddd (draft *obsolete*) [visible ] A [rewritten using amend as 2:323a9c3ddd91]
   |/
   o  0:d20a80d4def3 (draft) [ ] base
   
@@ -1152,7 +1152,7 @@ Test bundle overlay onto hidden revision
   $ hg log -G --hidden
   @  2:b7d587542d40 (draft) [tip ] B+
   |
-  | x  1:44526ebb0f98 (draft *obsolete*) [ ] B [rewritten using amend as 2:b7d587542d40 (at 1970-01-01 00:00 +0000)]
+  | x  1:44526ebb0f98 (draft *obsolete*) [ ] B [rewritten using amend as 2:b7d587542d40]
   |/
   o  0:4b34ecfb0d56 (draft) [ ] A
   
@@ -1279,7 +1279,7 @@ bookmarks change
   $ hg commit --amend -m "message"
   $ hg book bookb -r 13bedc178fce --hidden
   $ hg log -r 13bedc178fce
-  4:13bedc178fce (draft *obsolete*) [ bookb] add b [rewritten using amend as 5:a9b1f8652753 (at 1970-01-01 00:00 +0000)]
+  4:13bedc178fce (draft *obsolete*) [ bookb] add b [rewritten using amend as 5:a9b1f8652753]
   $ hg book -d bookb
   $ hg log -r 13bedc178fce
   abort: hidden revision '13bedc178fce'!
@@ -1319,7 +1319,7 @@ Test ability to pull changeset with loca
   $ hg log -G --hidden
   @  3:b0551702f918 (draft) [tip ] 2
   |
-  | x  2:e008cf283490 (draft *obsolete*) [ ] 2 [rewritten using amend as 3:b0551702f918 (at 1970-01-01 00:00 +0000)]
+  | x  2:e008cf283490 (draft *obsolete*) [ ] 2 [rewritten using amend as 3:b0551702f918]
   |/
   o  1:e016b03fd86f (draft) [ ] 1
   |