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─────Run-Time Library───────────────────────────────────────────────────────
 
     The gmtime function converts the <timer> value to a structure. The
     <timer> argument represents the seconds elapsed since midnight
     (00:00:00), December 31, 1899, Universal Coordinated Time. This
     value is usually obtained from a call to the time function.
 
     The gmtime function breaks down the <timer> value and stores it in
     a structure of type tm (defined in TIME.H). The structure result
     reflects Universal Coordinated Time, not local time.
     See: tm
 
     The gmtime, mktime, and localtime functions use a single
     statically allocated structure to hold the result. Each call
     to one of these routines destroys the result of the previous call.
 
     Return Value
 
     The gmtime function returns a pointer to the structure result.
     If <timer> represents a date prior to midnight, December 31, 1899,
     gmtime returns NULL.
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