Good grief, not again! tybalt89 kindly provided you with sample code (doing your job for you, you ought to have posted sample code in your original question). Now, instead of posting code based on tybalt89's superb code, you again post a short paragraph of text!

You should have taken the time to post a reply showing the exact program you ran (based on tybalt89's code), the exact output you saw (which you say "doesn't work"), and the exact output you need for it to "work".

For more background on where I'm coming from, please read:

In reply to Re^3: The day before a specific date by eyepopslikeamosquito
in thread The day before a specific date by jpys

Title:
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