How can i convert two java.time.LocalDateTime instances to kotlin.time.Duration? i can’t find stdlib converting functions like java.time.Duration.between(t1, t2) for represent two time’s diffrences.

That's because the difference is between two instants in time, not two

LocalDateTime

instances. Any conversion on local date time is ambiguous because of timezones and daylight savings time. You must instead do this conversion on

Instant

.

val tz = TimeZone.UTC
val dt1 = LocalDateTime(...).toInstant(tz)
val dt2 = LocalDateTime(...).toInstant(tz)

val duration = dt1 - dt2

ah thanks! reveal TimeZone is important things! thank you