proposal: time: a better way to validate a time instance

[amarjeetanandsingh]

Proposal Details

With current time pkg api, what is a good way to validate if a given input date is valid or not?

Suppose a scenario we have given three ints 2021, 02 and 29, for year,month,day and need to validate if it represents a valid date or not.

This can be achieved by writing a small helper function like

func isValidDate(year, month, day int) bool {
	t := time.Date(year, time.Month(month), day, 0, 0, 0, 0, time.UTC)
	y, m, d := t.Date()

	return y == year && m == time.Month(month) && d == day
}

Or maybe another way could be -

func isValidDate(year, month, day int) bool {
	dateStr := fmt.Sprintf("%d-%d-%d", year, month, day)
	_, err := time.Parse("2006-1-2", dateStr)
	return err == nil
}

What approach would u recommend for this? Or is this use case worthy enough to be added in the time pkg?

[seankhliao]

Unlike many projects, the Go project does not use GitHub Issues for general discussion or asking questions. GitHub Issues are used for tracking bugs and proposals only.

For questions please refer to https://github.com/golang/go/wiki/Questions