Excel is most happy when you enter dates and times with the correct separators.
1/1/2004 is a good date. So is 1-1-2004.
If you just entered 112004 in a cell formatted as a date you'll get:
Wednesday, August 27, 2206
the 112,004th day since January 1, 1900.
Chip Pearson has come up with VBA code, using the Worksheet_Change event procedure, that will allow you to enter dates without dashes or slashes.
Date And Time Entry
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