Which report includes the Date and Time group?

The report that includes the Date and Time group is indeed both METAR and SPECI. In aviation meteorology, these are standard weather reports used to convey current weather conditions and observations.

METAR reports consist of a fixed format that includes a Date and Time group at the beginning, which indicates when the observation was made. This allows pilots and meteorologists to determine the timeliness of the weather data they are reviewing. The SPECI report, which is issued for significant weather changes between routine METAR reports, also includes the Date and Time group to provide context for the newly observed conditions.

Including the Date and Time is essential for situational awareness in aviation, as weather conditions can change rapidly and the timing of observations can significantly affect flight safety and planning. Hence, both METAR and SPECI reports carry this crucial information.