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I need to convert the current system time date into a number. The number has to be the number of the day of the year! For example if it is the 23.1.2005 at the system time then the number has to be 23! If the current day is the 5.2.2005 it has to be the number 36 and so on!
There is a function (Seconds to date/time), in the time & dialog group, that does that - the day of the year is one of the components of the cluster it returns. You can connect directly to it a timestamp or a number representing seconds since 1904/1/1 (old LabVIEW timestamp).