"Thu, 29 Jan 1970 12:02:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
12:02:21
General datetime
1970-01-29 12:02:21Z
For Database
1970-01-29 12:02:21
For HTTP1.1
Thu, 29 Jan 1970 12:02:21 GMT