+ <b>The</b> <b>range</b> <b>expression</b>
+
+ date:<since>..<until>
+
+ The above expression restricts the results to only messages
+ from <since> to <until>, based on the Date: header.
+
+ <since> and <until> can describe imprecise times, such as "yes-
+ terday". In this case, <since> is taken as the earliest time
+ it could describe (the beginning of yesterday) and <until> is
+ taken as the latest time it could describe (the end of yester-
+ day). Similarly, date:january..february matches from the begin-
+ ning of January to the end of February.
+
+ Currently, we do not support spaces in range expressions. You
+ can replace the spaces with '_', or (in most cases) '-', or (in
+ some cases) leave the spaces out altogether. Examples in this
+ man page use spaces for clarity.
+
+ Open-ended ranges are supported (since Xapian 1.2.1), i.e. it's
+ possible to specify date:..<until> or date:<since>.. to not
+ limit the start or end time, respectively. Pre-1.2.1 Xapian
+ does not report an error on open ended ranges, but it does not
+ work as expected either.
+
+ Entering date:expr without ".." (for example date:yesterday)
+ won't work, as it's not interpreted as a range expression at
+ all. You can achieve the expected result by duplicating the
+ expr both sides of ".." (for example date:yesterday..yester-
+ day).
+
+ <b>Relative</b> <b>date</b> <b>and</b> <b>time</b>
+ [N|number] (years|months|weeks|days|hours|hrs|minutes|mins|sec-
+ onds|secs) [...]
+
+ All refer to past, can be repeated and will be accumulated.
+
+ Units can be abbreviated to any length, with the otherwise
+ ambiguous single m being m for minutes and M for months.
+
+ Number can also be written out one, two, ..., ten, dozen, hun-
+ dred. Additionally, the unit may be preceded by "last" or
+ "this" (e.g., "last week" or "this month").
+
+ When combined with absolute date and time, the relative date
+ and time specification will be relative from the specified
+ absolute date and time.
+
+ Examples: 5M2d, two weeks
+
+ <b>Supported</b> <b>absolute</b> <b>time</b> <b>formats</b>
+ H[H]:MM[:SS] [(am|a.m.|pm|p.m.)]
+
+ H[H] (am|a.m.|pm|p.m.)
+
+ HHMMSS
+
+ now
+
+ noon
+
+ midnight
+
+ Examples: 17:05, 5pm
+
+ <b>Supported</b> <b>absolute</b> <b>date</b> <b>formats</b>
+ YYYY-MM[-DD]
+
+ DD-MM[-[YY]YY]
+
+ MM-YYYY
+
+ M[M]/D[D][/[YY]YY]
+
+ M[M]/YYYY
+
+ D[D].M[M][.[YY]YY]
+
+ D[D][(st|nd|rd|th)] Mon[thname] [YYYY]
+
+ Mon[thname] D[D][(st|nd|rd|th)] [YYYY]
+
+ Wee[kday]
+
+ Month names can be abbreviated at three or more characters.
+
+ Weekday names can be abbreviated at three or more characters.
+
+ Examples: 2012-07-31, 31-07-2012, 7/31/2012, August 3
+
+ <b>Time</b> <b>zones</b>
+ (+|-)HH:MM