The two-week periods start when the UNIX time is divisible by a certain number. Does anybody remember what the number is?
1210000
So the current period is from 1395130000 (18 Mar 2014 08:06:40 GMT) to 1396340000 (01 Apr 2014 08:13:20 GMT)
The next period is from 1396340000 (01 Apr 2014 08:13:20 GMT) to 1397550000 (15 Apr 2014 08:20:00 GMT), etc...
Just what I was looking for. I plan to eventually make a tool to facilitate this. Unless somebody does it before me, of course
. (Which they are encouraged to do)