I often need to calculate a day number in a month. For example, I need to work out the 3rd Tuesday of a month, or the 4th Friday, and so on. To make that easy, in our free SDU Tools for developers and DBAs, we added a tool to do just that. It's a function called DayNumberOfMonth.
It's a function that takes four parameters:
@Year is the year (of the month in question)
@Month is month in question (as a number within a calendar year i.e. March = 3)
@DayOfWeek is an integer with Sunday = 1, Monday = 2, etc.
@DayNumber is also an integer for the day number (i.e. 3 for 3rd Monday)
You can use our tools as a set or as a great example of how to write functions like these.
Find out more
You can see it in action in the main image above, and in the video here:
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