github.com/mish33/go-calendar

Date manipulation functions.

// IsLeap returns true if year is a leap year. func IsLeap(year int64) bool

// NextDay advance Time structure to the next day. func NextDay(t *time.Time)

// PrevDay adjust Time structure one day behind. func PrevDay(t *time.Time)

// NextMonth advance Time structure one month ahead. func NextMonth(t *time.Time)

// PrevMonth adjust Time structure one month behind. func PrevMonth(t *time.Time)

// Weekday returns day of week number. // // Use Sakamoto's method (valid for dates in Oct 15, 1582 - Dec 31, 9999) // (see http://en.wikipedia.org/wiki/Calculating_the_day_of_the_week ) // // Args: // year (e.g., 1988) // month (1-12) // day of the month (1-31) // Returns: // 0 = Sunday, 1 = Monday, ... // func Weekday(year, month, day int) int