In version 2022a of the file "europe", we read for Simferopol:       # The _Economist_ (1994-05-28, p 45) reports that central Crimea switched       # from Kiev to Moscow time sometime after the January 1994 elections.       # Shanks (1999) says "date of change uncertain", but implies that it happened       # sometime between the 1994 DST switches.  Shanks & Pottenger simply say       # 1994-09-25 03:00, but that can't be right.  For now, guess it       # changed in May.                                2:00   C-Eur   EE%sT   1994 May       # From IATA SSIM (1994/1997), which also says that Kerch is still like Kiev.                                3:00   E-Eur   MSK/MSD 1996 Mar 31  0:00s                                3:00   1:00    MSD     1996 Oct 27  3:00s       # IATA SSIM (1997-09) says Crimea switched to EET/EEST.       # Assume it happened in March by not changing the clocks.                                3:00   Russia  MSK/MSD 1997                                3:00   -       MSK     1997 Mar lastSun  1:00u    •  The quoted text is inconsistent:       The comment says that Simferopol uses Moscow time since 1994 May, but       the Zone line              "3:00   E-Eur   MSK/MSD 1996 Mar 31  0:00s"       contradicts it (Moscow had other switching times between summer       and winter times). Which is correct?    •  It is not clear what "IATA SSIM (1994/1997)" actually says. They       probably do not specify the switching times expressed with       the Zone line              "3:00   E-Eur   MSK/MSD 1996 Mar 31  0:00s"       or do they?    •  The Zone line              "3:00   Russia  MSK/MSD 1997"       is redundant.    Michael Deckers.