calculate date in diferent time zones

hi guys,

i was wondering if its possible to calculate a date on GMT and at the same time PST.

For instance, at a specific moment it could be 1AM at GMT so the date would be Nov 5th and at the same time 5PM at PST Nov 4th.

is there a way to now this from a lsl function?

thanx in advanced

For THOSE two particular timezones you can use the functions llGetGMTclock() and llGetWallclock() and infer whether the date is different between the two locations based on the results (i.e. if the time is later in the Pacific region, it must be one day behind the GMT date). I suggest that because it will automatically factor in daylight savings.

just get GMT, add/subtract your offset, and check to see if the calcualtion lies outside the range of 00:00-23:59... if it does, correct and add or subtract a day as appropriate.

conceptually:
x= GMT+ offset
if x >= 24hours get date and add 1
if x < 0hours get date and subtract 1

using llGetGMTclock and llGetDate

EDIT: good call hewee, if wall > GMT, get date -=1 day for PST

thank you both, I got the picture

I'm just starting sls but i'll try to do it


EDIT:

btw, wall can never be > GMT because wall is always GMT-8(not counting DST). wall is actually = PST.

or am I missing something?

I think you are, I'm afraid. Wall is > than GMT from 16:00 until 23:59 PST every day, during which time it's 00:00 to 07:59 the following day here in London. Which is what you wanted to check for.

Actually to be accurate for the whole year, you have to build a list of how many days in each month.

Nov 1st, 1AM GMT == Oct 31st 5PM PST

And to be completely accurate you need to account for leap years.

both wallclock and gmt are seconds from midnight, so yeah it can be greater because it's still running seconds from the previous day. Jesse makes an excellent point too, you'll need at least the last day for each previous month, as well as a special tick for both the year changeover(assuming you want the WHOLE date), and leap years.