"Tue, 13 Jan 1970 21:11:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
21:11:00
General datetime
1970-01-13 21:11:00Z
For Database
1970-01-13 21:11:00
For HTTP1.1
Tue, 13 Jan 1970 21:11:00 GMT