"Wed, 21 Jan 1970 07:46:24"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700121
Only TIME
07:46:24
General datetime
1970-01-21 07:46:24Z
For Database
1970-01-21 07:46:24
For HTTP1.1
Wed, 21 Jan 1970 07:46:24 GMT