Hi, Anybody knows how to get millisecond at any time I want(not current time), for example, if I wanna transform

2023-01-01

to milliseconds, what should I do? is there something like

Date(2023,1,1).getMillisecond()

?

Kotlinx datetime should be able to get you what you need. If you’re only targeting JVM, you can use Java’s LocalDate API directly (Kotlinx datetime is basically a wrapper over this API, with backports for non-JVM targets). You can also use the standard Java

LocalDate

APIs on Android, but you’ll need to enable desugaring

Hi, thanks a lot , finally I got a solution like

val startTime = LocalDateTime.of(2023, 1, 1, 0, 0, 0).toEpochSecond(ZoneOffset.of("+08:00"))

which is inspired by your advice. You made my day!