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Yes, there is. http://en.wikipedia.org/wiki/Time_zone#List_of_UTC_offsets http://en.wikipedia.org/wiki/Time_zone#List_of_UTC_offsets

• tellarin 14y ago
  Interestly quite a few use 30min and three use 45min, but none uses 15min. I wonder why...
  • lostlogin 14y ago
    Might be revealing a profound misunderstanding, but isn't that just because of the reference point? If UTC+0 were the The Chatham Islands, then a few would.
    • Dylan16807 14y ago
      And then there would be a gap at 45. The point is that only three of the four quadrants are occupied.
      • lostlogin 14y ago
        Yeah that isn't covered by what I said. I wonder if it relates to convenience. Having the same time as your neighbour is probably more handy than having a day that is off by 15 in my opinion, even off by 30 wouldn't bother me much. There must be countries that have muddled through this scenario. But it still leaves a question as to why only certain time points are chosen and others avoided.