DayBack Behaviors, Hacks, and Extensions

Search our actions and extensions library for more options to customize your calendar

Show warning dialog box if the new event starts in the past; the user can then choose to cancel or continue.
Filtering, Sorting and Permissions Productivity and Shortcuts

Easy Download and Install


Trigger   On Event Create
Script InThPastWarningV1.js
Options Open in new window: No  Prevent default action: Yes

See it in action


FileMaker, Google, Mobile, Microsoft 365, Salesforce

Installation Requirements

Easy Install

Download Information