--- a/mercurial/util.py	Thu Feb 15 21:14:57 2018 +0800
+++ b/mercurial/util.py	Fri Feb 16 17:24:31 2018 -0500
@@ -2212,7 +2212,7 @@
             try:
                 d["d"] = days
                 return parsedate(date, extendeddateformats, d)[0]
-            except Abort:
+            except error.ParseError:
                 pass
         d["d"] = "28"
         return parsedate(date, extendeddateformats, d)[0]

--- a/tests/test-parse-date.t	Thu Feb 15 21:14:57 2018 +0800
+++ b/tests/test-parse-date.t	Fri Feb 16 17:24:31 2018 -0500
@@ -286,3 +286,9 @@
   $ hg debugdate "2016-07-27 121021Z"
   internal: 1469621421 0
   standard: Wed Jul 27 12:10:21 2016 +0000
+
+Test parsing months
+
+  $ for i in Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec; do
+  >   hg log -d "$i 2018" -r null
+  > done

--- a/tests/test-shelve.t	Thu Feb 15 21:14:57 2018 +0800
+++ b/tests/test-shelve.t	Fri Feb 16 17:24:31 2018 -0500
@@ -1711,7 +1711,7 @@
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo 3 >> file && hg ci -Am 13
   $ hg shelve --list
-  default         (*s ago)    changes to: 1 (glob)
+  default         (*s ago) * changes to: 1 (glob)
   $ hg unshelve --keep
   unshelving change 'default'
   rebasing shelved changes
@@ -1727,7 +1727,7 @@
   rebasing 2:3fbe6fbb0bef "changes to: 1" (tip)
   unshelve of 'default' complete
   $ hg shelve --list
-  default         (*s ago)    changes to: 1 (glob)
+  default         (*s ago) * changes to: 1 (glob)
   $ cd ..
 
 Unshelving when there are deleted files does not crash (issue4176)