Last week I was working on something which required me to convert LocalDateTime to Instant. The direct conversion APIs that are available needed an instance of ZoneOffset to perform the conversion. Catch was that I had ZoneId and not ZoneOffset there was a tiny round-about way to do so.

  • Convert LocalDateTime to ZonedDateTime using ZoneId : ZonedDateTime.of(localDateTime, zoneId)
  • Convert ZonedDateTime to Instant : zonedDateTime.toInstant()

I don’t know why there isn’t a native API to convert from LocalDateTime to Instant directly using a ZoneId. If you do then I would like to know either via email or Twitter (@varun_barad).