Privacy Policy — Holiday Calendar Overlay

Last updated: July 2026

Holiday Calendar Overlay is a Chrome extension that detects date pickers on web pages and overlays Jewish and civil holiday indicators on them, based on the settings you choose.

Data collection

This extension does not collect, transmit, sell, or share any data. It has no server, makes no network requests, and does not use analytics, tracking, or advertising of any kind.

What the extension reads

To find and label date pickers, the extension's content script reads the visible structure of the web page you're viewing (element attributes and text used to identify calendar cells and dates). This reading happens entirely inside your browser. Nothing about the pages you visit — their content, the dates you select, or any other information — is ever sent anywhere. It is used only, in memory, to decide where to draw a holiday badge on the page.

What the extension stores

Your preferences (which holiday calendars are enabled, and which civil countries' holidays to show) are saved using Chrome's built-in chrome.storage.sync API. This data:

• consists only of your settings — no browsing history, no page content, no personal information
• is stored locally and, if you're signed into Chrome, synced across your own devices by Chrome itself, the same way Chrome syncs your bookmarks
• is never sent to the extension developer or any third party

Permissions

The extension requests access to all websites (<all_urls>) because date pickers can appear on any site — flight and hotel booking, event ticketing, appointment scheduling, and so on — and there is no way to predict in advance which sites a given user needs it on. This access is used solely to detect and label date pickers as described above.

Third parties

The extension does not integrate with, embed, or share data with any third-party service.

Changes to this policy

If this policy changes, the updated version will be posted at this same address with a revised "last updated" date.

Contact

Questions about this policy can be raised via the GitHub issue tracker.