"Sat, 03 Jan 1970 05:54:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
05:54:42
General datetime
1970-01-03 05:54:42Z
For Database
1970-01-03 05:54:42
For HTTP1.1
Sat, 03 Jan 1970 05:54:42 GMT