datetime_to_time reports incorrect date

[Feoramund]

Context

• Operating System & Odin Version: Linux 6.7.6, Odin commit 7df7fec

Expected Behavior

The following program should output a date of March 1st, but it reports February the 29th.

package main

import "core:fmt"
import "core:time"

main :: proc() {
	fmt.println(time.datetime_to_time(2024, 3, 1, 0, 0, 0))
}

Failure Information (for bugs)

The program prints this:

2024-02-29 00:00:00.000000000 +0000 UTC true

I think the procedure isn't taking into account leap years with regard to February's extra day, and the logic behind DAYS_PER_400_YEARS and the other calculations is sound, but it's starting the arithmetic modulo from the year minus 1970, which would give incorrect results.