Modern Chrono AddMonths

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AddMonths

Adds calendar months and leaves the UTC offset untouched.

Syntax

AddMonths( 1 )

Notes

• calendar months, offset untouched.

Examples

#import "std/chrono"
using chrono

'' Exact-field arithmetic on the calendar: the offset is left untouched
dim as DateTime d = DateTime( 2026, 1, 31, 12, 0, 0, 0 )

print d.AddMonths( 1 ).ToIsoString( )    '' 2026-02-28T12:00:00 -- clamped

'' AddCalendarMonths is the same walk with the zone offset re-resolved
'' afterwards, which is what "same time next month" means where DST
'' changes in between

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Library: Chrono Date and Time
Category: Date and Time (Chrono)
Documented under: Exact Arithmetic Vs Calendar Arithmetic