Interactive publication
Back to the catalogueWeek systemsCase 07 of 08
Substitute (in-lieu) holiday days
When a public holiday falls on a weekend, many countries observe a substitute weekday instead (UK 'bank holiday in lieu', much of APAC). The observed date is not the calendar date, so a naive fixed-date rule flags the wrong day.
Class
Case to account for
Affects
1 conversion
01
Detection
A fixed-date holiday lands on Sat/Sun and the country grants an in-lieu day.
02
Mitigation
01
Apply each country's substitution rule; carry both the nominal and observed dates.
03
Affected conversions
Local datenational holiday flag
OPEN