# Comparer 2 dates

**URL:** <https://discuss.workflowgen.com/t/comparer-2-dates/2152>\
**Category:** General WorkflowGen Discussion\
**Created:** [June 21, 2023, 8:47am UTC](https://discuss.workflowgen.com/t/comparer-2-dates/2152 "2023-06-21T08:47:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bertrand](https://avatars.discourse-cdn.com/v4/letter/b/a88e4f/32.png) [@Bertrand](https://discuss.workflowgen.com/u/Bertrand)\
**Post date:** [June 21, 2023, 8:47am UTC](https://discuss.workflowgen.com/t/comparer-2-dates/2152/1 "2023-06-21T08:47:53Z")

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Bonjour,  
Je voudrais pouvoir bloquer l’ajout d’une date de fin si elle est inférieure à la date de début.  
J’ai bien trouvé l’option de comparaison dans le formulaire mais cela ne fonctionne pas.

Auriez vous une autre solution?

Merci d’avance.  
 ![date](https://canada1.discourse-cdn.com/flex030/uploads/workflowgen/original/1X/42d77a8e9d0529664c50ab0056218ea78a9bd618.jpeg)

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**Author:** ![kevin.lee](https://avatars.discourse-cdn.com/v4/letter/k/65b543/32.png) [@kevin.lee](https://discuss.workflowgen.com/u/kevin.lee)\
**Post date:** [June 27, 2023, 1:33pm UTC](https://discuss.workflowgen.com/t/comparer-2-dates/2152/2 "2023-06-27T13:33:33Z")

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Unfortunately WFG comparison validate does not handle type conversion for date time. You can consideration using Custom validation. It allows to use C# method to convert the value before the comparison

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/workflowgen/original/1X/171e635b3ff9aac721009fe9e54470e476f5cf03.png)