Another day, another Functoid was added to the package. I updated it again with a new functoid: Add Days to Date Functoid Functoid, which is now part of the BizTalk Mapper Extensions UtilityPack project available for BizTalk Server 2020.
Add Days to Date Functoid
This function allows you to add days to one date in which you can specify the format of the input date.
- This functoid requires three input parameters:
- The first input is the date where we want to add the desired days.
- The second input is the number of days to be added.
- The third input is the format of the input date.
- Examples:
- Inputs:
"2024-03-03", 10, "yyyy-MM-dd"– Output: “2024-03-13“. - Inputs:
"03/03/2024", 5, "MM/dd/yyyy"– Output: “03/08/2024“.
- Inputs:

📝 One-Minute Brief
The Add Days to Date functoid from the BizTalk UtilityPack simplifies date manipulation inside BizTalk Server maps. This post explains how the functoid works, when to use it, and how it helps create cleaner mapping logic for date‑based integration scenarios.
BizTalk Mapper Extensions Utility Pack
BizTalk Mapper Extensions Utility Pack is a set of libraries with several useful functoids to include in a map, extending BizTalk Mapper capabilities.

Where can I download it?
You can download the complete Azure Function source code here:
I hope you find this helpful! If you liked the content or found it useful and want to help me write more, you can buy (or help buy) my son a Star Wars Lego set!