"Sat, 03 Jan 1970 07:27:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
07:27:12
General datetime
1970-01-03 07:27:12Z
For Database
1970-01-03 07:27:12
For HTTP1.1
Sat, 03 Jan 1970 07:27:12 GMT