"Sat, 31 Jan 1970 07:45:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
07:45:57
General datetime
1970-01-31 07:45:57Z
For Database
1970-01-31 07:45:57
For HTTP1.1
Sat, 31 Jan 1970 07:45:57 GMT