"Thu, 15 Jan 1970 15:05:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
15:05:54
General datetime
1970-01-15 15:05:54Z
For Database
1970-01-15 15:05:54
For HTTP1.1
Thu, 15 Jan 1970 15:05:54 GMT