"Thu, 15 Jan 1970 23:33:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
23:33:04
General datetime
1970-01-15 23:33:04Z
For Database
1970-01-15 23:33:04
For HTTP1.1
Thu, 15 Jan 1970 23:33:04 GMT