"Thu, 12 Feb 1970 00:52:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
00:52:36
General datetime
1970-02-12 00:52:36Z
For Database
1970-02-12 00:52:36
For HTTP1.1
Thu, 12 Feb 1970 00:52:36 GMT