"Tue, 31 Mar 1970 07:11:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700331
Only TIME
07:11:21
General datetime
1970-03-31 07:11:21Z
For Database
1970-03-31 07:11:21
For HTTP1.1
Tue, 31 Mar 1970 07:11:21 GMT