Asterisk VoIP PBX allows you to setup your dialplan to route calls to different places depending on the time of day.
I setup a system in the UK which has British summer time / daylight savings time. (BST). The documentation on Asterisk.org is always missing examples.
The examples on the incredibly helpful voip-info.org didn’t contain any information about timezones. Googling also didn’t reveal much.
Eventually I managed to find the right Google words to dig up a blog.
The correct use of timezones for the UK is:
same = n,GotoIfTime(8:30-17:00,mon-thu,*,*,/usr/share/zoneinfo/Europe/London?helpdeskopen,1) same = n,GotoIfTime(8:30-16:00,fri,*,*,/usr/share/zoneinfo/Europe/London?helpdeskopen,1) same = n,Verbose(1, "Helpdesk is in night mode") same = n,Playback(duty-manager-details) exten = helpdeskopen,1,Verbose(1, "Helpdesk is in day mode") same = n,Playback(pls-wait-connect-call)
Obviously modify to fit your needs.
Until I found the helpful blog I had assumed that the timezone would be something like “BST” or “GMT” or “UK”.. I wouldn’t have even though of trying a timezone (zoneinfo) file!
Examples in documentation go a long way to reducing the difficulty of learning new things. I get frustrated that voip-info has been left to do a lot of the heavy lifting in terms of Asterisk examples and documentation.