It is important to understand that, underneath, the DateTime data type is represented by a floating point number. For example, 12 noon on May 22nd 2012 is stored as 41,051.5. The whole number 41,051 represents the date; it is the number of days that have passed since December 31st, 1899. The fractional part 0.5 represents the time. As a day (24 hours) is 1, an hour is 1/24 and 12 hours is 12/24, which is equal to 1/2 or 0.5. Knowing this, we can use many of the numeric functions that we saw earlier to perform date and time calculations. For example, we can use the Floor()function to remove the time information from a date.