// dst-spring-forward.el — Earth calendar handles the DST transition.
// 2026 spring DST: March 8 at 02:00 EST → clocks jump to 03:00 EDT.
// 2026-03-08 06:30 UTC = 01:30 EST (just before the jump).
// Add 1 hour → 07:30 UTC = 03:30 EDT (the wall clock skipped 02:30 entirely).

fn run_test() -> String {
    let z: Zone = zone("America/New_York")
    let cal: Calendar = earth_calendar(z)
    let i: Instant = unix_seconds(1772951400)
    let later: Instant = i + 1.hour
    let ct: CalendarTime = in_calendar(later, cal)
    return cal_format(ct, "HH:mm z")
}

fn main() -> Void {
    println(run_test())
}