"Sat, 31 Jan 1970 22:40:58"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
22:40:58
General datetime
1970-01-31 22:40:58Z
For Database
1970-01-31 22:40:58
For HTTP1.1
Sat, 31 Jan 1970 22:40:58 GMT