"Tue, 13 Jan 1970 00:54:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
00:54:42
General datetime
1970-01-13 00:54:42Z
For Database
1970-01-13 00:54:42
For HTTP1.1
Tue, 13 Jan 1970 00:54:42 GMT