# time functions

• 09-05-2003
Dragonbide
time functions
Is there a time function or class that will allow me to find the starting and ending day of the week for any month (example: january 2000 starts on a saturday)?
• 09-05-2003
DougDbug
tm_wday
Well... there is a variable in time.h called tm_wday. Sunday = 0, Saturday = 6.

Ummm... I don't know how to get the structure loaded with the date-of-interest... So, I guess you'll have to look that up... Or, wait for someone else to answer. :)

Code:

```time_t typedef a-type time_t; // The type is the arithmetic type a-type of an object that you // declare to hold the value returned by time. The value // represents calendar time. tm struct tm {     int tm_sec;        seconds after the minute (from 0)     int tm_min;        minutes after the hour (from 0)     int tm_hour;      hour of the day (from 0)     int tm_mday;      day of the month (from 1)     int tm_mon;        month of the year (from 0)     int tm_year;      years since 1900 (from 0)     int tm_wday;      days since Sunday (from 0)     int tm_yday;      day of the year (from 0)     int tm_isdst;      Daylight Saving Time flag     };```
• 09-05-2003
Prelude
Try this to find the first day. Once you have that it's a simple matter to get the last day:
Code:

```int first_day_of_month ( int year, int month ) {     struct tm t = { 0 };     struct tm *tp;     time_t    now;     t.tm_mday = 1;     t.tm_mon  = month-1;     t.tm_year = year-1900;     now = mktime(&t);     tp = localtime(&now);     return tp->tm_wday; }```