"Wed, 21 Jan 1970 07:24:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700121
Only TIME
07:24:42
General datetime
1970-01-21 07:24:42Z
For Database
1970-01-21 07:24:42
For HTTP1.1
Wed, 21 Jan 1970 07:24:42 GMT