"Sun, 04 Jan 1970 14:18:26"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700104
Only TIME
14:18:26
General datetime
1970-01-04 14:18:26Z
For Database
1970-01-04 14:18:26
For HTTP1.1
Sun, 04 Jan 1970 14:18:26 GMT