MQL4参考 日期和时间 TimeDay
Returns the day of month (1 - 31) of the specified date.
int TimeDay( datetime date // date and time );
Parameters
date
[in] Datetime as number of seconds elapsed since midnight (00:00:00), January 1, 1970.
Returned value
Day of month (1 - 31) of the specified date.
Example:
int day=TimeDay(D'2003.12.31'); // day is 31