- Upstream 2010l:
      - Change Cairo's 2010 reversion to DST from the midnight between
        September 8 and 9 to the midnight between September 9 and 10.
      - Change Gaza's 2010 return to standard time to the midnight between
        August 10 and 11.
      - Bahia de Banderas (Mexican state of Nayarit) changed time zone
        UTC-7 to new time zone UTC-6 on April 4, 2010
    - Upstream 2010m:
      - Hong Kong didn't observe DST in 1977
      - In zone.tab, remove obsolete association of Vostok Station with
        South Magnetic Pole; add association with Lake Vostok
    - Upstream 2010n:
      - Change end of DST in Samoa in 2011 from 2011-04-03 0:00 to
        2011-04-03 1:00