10/31/2022 0 Comments Date calculator in excel![]() ![]() If VarType(Date1) = vbDate Or VarType(Date1) = vbDouble Then 'check if Date1 is numeric Public Function OldDateDiff(ByVal Date1 As Variant, ByVal Date2 As Variant, ByVal Interval As String) As Longĭim RetVal As Long 'variable for the value we want to return OldDateAge(Date1, Date2) called like =OldDateAge($B2,TODAY()).OldDateDiff(Date1, Date2, Interval) called like =OldDateDiff($B2,TODAY(),"yyyy").Since as I explained above there is 2 different methods to calculate there is 2 different functions: But since VBA can actually handle pre-1900 dates we can write our own UDF (user defined function) for that. Image 1: #WERT! means #VALUE! (sorry for the German screenshot).Īlso in column D where the formula =DATEDIF($B2,TODAY(),"y") was used the string dates cannot be calculated with. You can see that if we enter pre-1900 dates that they are formatted as string (red dates) and post-1900 dates get formatted as numeric dates (green dates). We already know the fact that Excel cannot calculate with dates before 1900. So let's start and assume the following data. The calculation for that would be different. So the question needs to be asked more precisely. But this year she would have turned 44 years ( 2021 - 1977 = 44). Today she would not have had birthday yet this year and therefore she would be 43 years old. X": For example lets take the birthday of Maryam Mirzakhani compared to the date today. Second there is more than one way to calculate "how many years since the birth of Mr. Therefore a date format that cannot be misinterpret is a clear advantage. Since old dates cannot be real numeric dates but only entered as strings (looking like a date) that means misinterpretation needs to be avioded or you get wrong results. Date calculator in excel iso#The ABS function returns the absolute value of a number without its sign.First of all I highly recommend to use the ISO 8601 format yyyy-mm-dd for dates because even if you only have strings and no real numeric dates this is properly sortable and the only date format that is defined clearly and cannot be misinterpret like where no one can ever say if it is mm/dd/yyyy or dd/mm/yyyy because both actually exist. The INT function rounds a number down to the nearest integer. ![]() Our final technique hosts a custom formula with the INT and ABS functions working together to calculate years between two dates. Calculating Number of Complete Years Using Custom Formula ![]() You can also customize the added text to “years”, “months”, and “days”. You can also break this formula down and have the years, months, and days in separate columns. Here is what the collated formula and its results look like: We have also added the text “Y” for year(s), “M” for month(s), and “D” for day(s). The ampersand pieces the individual DATEDIFs into one formula. Date calculator in excel full#The third DATEDIF returns the days independent of the full months between C3 and D3, using the unit “md”. The unit used for the months is “ym” instead of “m” to return the months independent of the complete years. The second DATEDIF returns the number of months between C3 and D3. The first DATEDIF in the formula returns the complete number of years between C3 and D3 as mentioned in the section above. ![]()
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