Modern Chrono AddCalendarMonths

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AddCalendarMonths

Adds calendar months, then works out the UTC offset again for the new date.

Syntax

AddCalendarMonths( 1 )

Notes

• calendar months, offset re-resolved.

Examples

#import "std/chrono"
using chrono

'' "Same time next month": AddMonths, then the offset re-resolved for
'' the new local time
dim as DateTime d = DateTime( 2026, 1, 31, 12, 0, 0, 0 )

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

'' The day still CLAMPS to the end of the shorter month -- that is
'' calendar arithmetic everywhere, not a DST question
print d.AddCalendarMonths( 1 ).Day                '' 28

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