ctime, ctime64 - convert date and time to string

Syntax	#include <time.h> char *ctime(const time_t *clock); char *ctime64(const time64_t *clock);
Description	ctime() converts the time specified by clock to a local time specification. The function returns a pointer to a string consisting of 26 characters (see return value). clock is represented as the time in seconds since 00:00:00 UTC (Universal Time Coordinated; January 1, 1970). A call to ctime() has the same effect as asctime(localtime(clock)). Calling ctime64() has the same effect as asctime64(localtime(clock)), the latest and earliest displayable dates being 31.12.9999 23:59:59 hrs. local time and 1.1.1900 00:00:00 hrs. ctime() is not thread-safe. Use the reentrant function ctime_r() when needed.
Return val.	Pointer to a string
		if successful. The resulting string has a length of 26 (incl. the null byte) and is formatted as a date and time specification in the form: weekday month day hrs:min:sec year e.g. Thu Jun 14 15:20:54 2018\n\0
	EOVEFLOW	In case of an error. errno is set to indicate the error.
Notes	The asctime(), ctime(), ctime64(), gmtime(), gmtime64(), localtime() and localtime64() functions write their result into the same internal C data area. This means that each of these function calls overwrites the previous result of any of the other functions.
See also	altzone, asctime(), ctime_r(), daylight, gmtime(), localtime(), timezone, tzname, tzset(), time.h.