"Sat, 31 Jan 1970 07:50:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
07:50:37
General datetime
1970-01-31 07:50:37Z
For Database
1970-01-31 07:50:37
For HTTP1.1
Sat, 31 Jan 1970 07:50:37 GMT