At any given time at least 38 different UTC offsets are in use in the officially inhabited parts of the world: UTC-11 UTC-10 UTC-9:30 UTC-9 UTC-8 UTC-7 UTC-6 UTC-5 UTC-4:30 UTC-4 UTC-3:30 (November-March only) UTC-3 UTC-2:30 (March-November only) UTC-2 UTC-1 UTC UTC+1 UTC+2 UTC+3 UTC+3:30 (September-March only) UTC+4 UTC+4:30 UTC+5 UTC+5:30 UTC+5:45 UTC+6 UTC+6:30 UTC+7 UTC+8 UTC+8:45 UTC+9 UTC+9:30 UTC+10 UTC+10:30 UTC+11 UTC+11:30 UTC+12 UTC+12:45 (April-September only) UTC+13 UTC+13:45 (September-April only) UTC+14 Hank W. Austin, Texas, U.S.A. -----Original Message----- From: tz-bounces@iana.org [mailto:tz-bounces@iana.org] On Behalf Of David Patte ? Sent: Wednesday, July 17, 2013 02:54 To: tz@iana.org Subject: [tz] Number of active tz regions? I guess I could calculate it myself using the data that I have, but does anyone know off-hand how many tz regions are currently in use?