Initializing help system before first use

# XPRMdate2jdn

Purpose
Convert a date into a Julian Day Number (JDN).
Synopsis
`int XPRMdate2jdn(int year,int month, int day);`
Arguments

year | Year number
month | Month number (1-12)
day | Day number (1-31)

Return value
The JDN corresponding to the provided date.
Further information
The value returned by this function corresponds to the number of days elapsed since 1/1/1970.
Related topics
XPRMjdn2date, XPRMtime.
Parent Topic Post processing interface

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