"Thu, 08 Jan 1970 19:44:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
19:44:37
General datetime
1970-01-08 19:44:37Z
For Database
1970-01-08 19:44:37
For HTTP1.1
Thu, 08 Jan 1970 19:44:37 GMT