How to Calculate Due Dates and Move Weekends to Monday in Acrobat PDF Forms
Question details
The user needs to automatically calculate a due date 30 days after a specified calibration date in a PDF form, with the requirement to shift the final date to the following Monday if it falls on a weekend.

- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Creating or editing a dynamic PDF form that requires automated deadline calculations while excluding weekends.
- Observed behavior
- The form needs to parse a starting date, add exactly 30 days, evaluate the resulting day of the week, and add 1 or 2 days to ensure the final due date lands on a Monday rather than Saturday or Sunday.
Ensure you have access to the Prepare Form tool in Adobe Acrobat and possess basic familiarity with adding custom JavaScript calculation scripts to PDF text fields.
Use Custom JavaScript to Adjust Dates in Acrobat
Apply a custom calculation script in the field properties to parse the date, add the required days, and adjust for weekends using the getDay() method.
Adobe Acrobat forms support JavaScript for automated calculations. By utilizing the JavaScript Date object, you can dynamically extract the day of the week. In JavaScript, Sunday is represented by 0 and Saturday is represented by 6.
When the calculated date lands on a Saturday, you can add two days to shift it to Monday. If it lands on a Sunday, adding one day will also shift it to Monday.
Open your PDF in Acrobat, go to 'Tools' > 'Prepare Form', and double-click the target Due Date text field to open its Properties dialog.
Navigate to the 'Calculate' tab, select the 'Custom calculation script' radio button, and click the 'Edit' button to open the JavaScript editor.
Write the initial script to extract the value from your base date field (e.g., the calibration date), convert it into a Date object, and add 30 days to it using the setDate() and getDate() methods.
Add the conditional logic to check for weekends: `if (date.getDay() == 0) { date.setDate(date.getDate() + 1); } else if (date.getDay() == 6) { date.setDate(date.getDate() + 2); }`. This ensures any Sunday (0) or Saturday (6) is moved to Monday.
Format the final adjusted date back into your preferred string format (such as MM/DD/YYYY) and assign it to `event.value`. Click 'OK' to save the script and close the properties window.

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While complex JavaScript calculations require advanced PDF scripting environments, WPS Office provides a highly intuitive and comprehensive PDF editor. It allows you to create, edit, fill, and manage PDF forms seamlessly without needing heavy desktop software, ensuring your document workflows remain efficient.
- 1. Open your PDF form: Launch WPS Office and open your interactive PDF form using the built-in PDF editor.
- 2. Access form features: Navigate to the 'Form' tab to interact with, fill out, or modify text fields, dropdowns, and checkboxes easily.
- 3. Save and export: Once your data is entered, easily save the document or share it directly without losing any original formatting or interactive elements.

Frequently Asked Questions
What does the getDay() method return in JavaScript?
The getDay() method returns the day of the week as an integer from 0 to 6, where 0 represents Sunday and 6 represents Saturday.
Can I apply this date calculation script to other PDF software?
Custom JavaScript calculations are fully supported in Adobe Acrobat. However, compatibility may vary across other third-party PDF readers depending on their support for the Acrobat JavaScript API.
How do I change the number of days added to the initial date?
In your custom script, simply change the integer added during the initial setDate() function call. For example, replace 30 with your desired number of days before running the weekend adjustment logic.




