mysql - Storing timezone in a database -

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i using mysql , php , need store timezone in db. spent bit reading on it, , seems need use america/los_angeles, , not pst, pacific standard time, pst8pdt, +02.00, etc.

do store whole america/los_angeles string, or there sort of integer id such https://stackoverflow.com/a/11580459/1032531 describes c#? if string, maximum number of characters?

the timezone strings america/new_york refer entries in so-called zoneinfo data base. read this. https://www.iana.org/time-zones it's presently maintained internet assigned numbers authority. changes lot, because maintainer scrambles keep changes daylight saving rules , other temporo-political stuff.

on unix-like systems entries stored in filesystem directory hierarchy, , not code number.

you asked:

do store whole america/los_angeles string

yes.

is there sort of integer id it?

no, not if want application , data base future-proof. there time_zone_id in part of mysql holds zoneinfo data, nobody has made promises keeping numbers unchanged.

the longest string in current (2015g) data base "america/argentina/comodrivadavia". it's 32 characters long. makes sense use varchar(64) storing information never run out.

by way, wordpress offers user picklist (drop down list) of available time zone names, , stores user's choice text.

http://www.iana.org/time-zones


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