Date Formats
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    Some commands allow the user to specify a date, e.g.:
    
    - backout, commit, import, tag: Specify the commit date.
    - log, revert, update: Select revision(s) by date.
    
    Many date formats are valid. Here are some examples:
    
    - ``Wed Dec 6 13:18:29 2006`` (local timezone assumed)
    - ``Dec 6 13:18 -0600`` (year assumed, time offset provided)
    - ``Dec 6 13:18 UTC`` (UTC and GMT are aliases for +0000)
    - ``Dec 6`` (midnight)
    - ``13:18`` (today assumed)
    - ``3:39`` (3:39AM assumed)
    - ``3:39pm`` (15:39)
    - ``2006-12-06 13:18:29`` (ISO 8601 format)
    - ``2006-12-6 13:18``
    - ``2006-12-6``
    - ``12-6``
    - ``12/6``
    - ``12/6/6`` (Dec 6 2006)
    - ``today`` (midnight)
    - ``yesterday`` (midnight)
    - ``now`` - right now
    
    Lastly, there is Mercurial's internal format:
    
    - ``1165411109 0`` (Wed Dec 6 13:18:29 2006 UTC)
    
    This is the internal representation format for dates. The first number
    is the number of seconds since the epoch (1970-01-01 00:00 UTC). The
    second is the offset of the local timezone, in seconds west of UTC
    (negative if the timezone is east of UTC).
    
    The log command also accepts date ranges:
    
    - ``<DATE`` - at or before a given date/time
    - ``>DATE`` - on or after a given date/time
    - ``DATE to DATE`` - a date range, inclusive
    - ``-DAYS`` - within a given number of days of today