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kotlinlang

```io.ktor.util.date.GMTDate```
 how to get timestamp of next month with GMTDate :disappointed: ?

Do you mean the timestamp of a first day of the next month or the timestamp of a current date in a month?

like the add method of java.util.Calendar
```Consider a GregorianCalendar originally set to August 31, 1999. Calling add(Calendar.MONTH, 13) sets the calendar to September 30, 2000.```
:pensive:

You can use the <https://github.com/Kotlin/kotlinx-datetime|kotlinx-datetime> library to achieve the necessary effect:
```val date = GMTDate(0, 0, 0, 31, io.ktor.util.date.Month.AUGUST, 1999)
val instant = Instant.fromEpochMilliseconds(date.timestamp)
val result = instant.plus(13, DateTimeUnit.MONTH, TimeZone.of("GMT"))
val local = result.toLocalDateTime(TimeZone.of("GMT"))
val newDate = GMTDate(seconds = local.second, minutes = local.minute, hours = local.hour, dayOfMonth = local.dayOfMonth, month = io.ktor.util.date.Month.from(local.monthNumber - 1), year = local.year)
println(newDate.toJvmDate())```
Please <https://youtrack.jetbrains.com/newIssue?project=KTOR|file a feature request> if you want to see this functionality in Ktor.

ok thx a lot, :kissing_heart: u save my day

You mean: <https://youtrack.jetbrains.com/issue/KTOR-2721>? :smile: