"Wed, 13 May 1970 07:11:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700513
Only TIME
07:11:23
General datetime
1970-05-13 07:11:23Z
For Database
1970-05-13 07:11:23
For HTTP1.1
Wed, 13 May 1970 07:11:23 GMT