April 2, 2013
5:28 p.m.
At 2013-04-02 02:23, John Haxby wrote:
On 02/04/13 09:58, Simon Perreault wrote:
I want to write a cron job or similar that activates one week prior to daylight saving time changes. (Or, more generically, one week prior to any time jumps, for any reason, DST or else.)
...
You can also use localtime(3) with the current time and the current time plus 7*24*2600 and compare the tm_hour field.
that would be 7*24*3600 (=7*24*60*60) (just because nobody mentioned the phreak-slip in follow-up yet :) ) I like the zdump solution, though, since it only needs to be run when the tz database is updated, not every hour. -- Alan Mintz <Alan_Mintz+TZ_IANA@Earthlink.net>