hi everyone,

I would like to give a color to a date in sheet 1 if the date exists in sheet 2
how can i doe this?
it's also possible that the date exists multiple times in sheet 2

Just use conditional formatting
Not using XL 2016 I don't know how that works between different sheets

__________________
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Excel 2016/365 has no problem using another sheet in conditional formatting. The formula might be along the lines of =ISNUMBER(MATCH(E5,Sheet2!$A$1:$A$24,0)) but if you could supply a file with sample data we could give a more definitive answer.