"Sat, 31 Jan 1970 07:55:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
07:55:18
General datetime
1970-01-31 07:55:18Z
For Database
1970-01-31 07:55:18
For HTTP1.1
Sat, 31 Jan 1970 07:55:18 GMT