A field with Date/Time data type (see Data types) can only contain valid dates.
The formatting properties available on the General page are:
Initial Value (enter a default value that will automatically appear in this field every time a new record is created, unless another value is entered instead of it - Initial value)
Caption (enter a caption to replace the field name above the column in Table View - see Captions)
Validation Rule (set a rule to validate possible data entries - see Validation rule)
Validation Text (write a display message for cases of invalid data - see Validation text)
Required (when checked a value is required in field - see Required property)
Index (choose from Primary Key, Indexed, No Index & Indexed (Unique) - see Indexes and primary keys)
The formatting properties available on the Format page are:
Year (choose from Long Form e.g. 1999, Short Form e.g. 99, & None)
Month (choose from Long Name e.g. January, Short Name e.g. Jan, & Digits e.g. 01)
Order (choose from Month/Day e.g. Jan/12, & Day/Month e.g. 12/Jan)
Separator (choose from \ - . / or blank e.g. 12-05-99, 12.05.99, 12/05/99, 12 05 99, etc.)
Add Time (click on the check box to add time to the date: select 0..12 to display AM/PM rather than the 24-hour clock e.g. 03:45 PM rather than15:45, and Seconds to display seconds e.g. 15:45:34)
If you only want to display the time, select Time rather than Date in the left-hand box and proceed as shown above.