Excel serial date converter
Convert Excel serial days and fractions using the 1900 or 1904 date system.
Preparing your tool…
How it works
Interpret fractions as time of day. Reject fictitious serial day 60 in the 1900 system.
Example
1900-system serial 61 is 1900-03-01; 1904-system serial 0 is 1904-01-01.
What should I check before using the result?
Select the workbook system yourself. Values are treated as date/time fields, without a time zone.