I am trying to add dates to two date fields in ArcGIS Pro using expressions in Arcade.

When I use the expression Date(2020,10,29) the result in the field is 29/11/2020, which is one month later than my desired date. The same thing has happened in the next field for a different date which should be 01/01/1983 but is resulting in 01/02/1983:

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Does anyone know why this is happening and how to prevent it?

2 Answers 2


It is a known limitation and considered as a BUG found in ArcGIS Pro 2.5 and will be fixed in upcoming versions.


I'm not sure if this is a BUG or will be fixed.

In Arcade the calculation of the month is a little bit confusing, because it uses the numbers from from 0-11, where 0 is January and 11 is December.


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