date timezone function

-- look here for time formatting http://www.lua.org/pil/22.1.html


local offset = "+8.00" --put your timezone value

local function format_time(timestamp, format, tzoffset, tzname)
   if tzoffset == "local" then  -- calculate local time zone (for the server)
      local now = os.time()
      local local_t = os.date("*t", now)
      local utc_t = os.date("!*t", now)
      local delta = (local_t.hour - utc_t.hour)*60 + (local_t.min - utc_t.min)
      local h, m = math.modf( delta / 60)
      tzoffset = string.format("%+.4d", 100 * h + 60 * m)
   end
   tzoffset = tzoffset or "GMT"
   format = format:gsub("%%z", tzname or tzoffset)
   if tzoffset == "GMT" then
      tzoffset = "+0000"
   end
   tzoffset = tzoffset:gsub(":", "")

   local sign = 1
   if tzoffset:sub(1,1) == "-" then
      sign = -1
      tzoffset = tzoffset:sub(2)
   elseif tzoffset:sub(1,1) == "+" then
      tzoffset = tzoffset:sub(2)
   end
   tzoffset = sign * (tonumber(tzoffset:sub(1,2))*60 +
tonumber(tzoffset:sub(3,4)))*60
   return os.date(format, timestamp)
end

local date = format_time(os.time(), "!%Y-%m-%d", offset)