"Tue, 12 May 1970 07:12:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700512
Only TIME
07:12:41
General datetime
1970-05-12 07:12:41Z
For Database
1970-05-12 07:12:41
For HTTP1.1
Tue, 12 May 1970 07:12:41 GMT