Google Calendar Background

Customize your Google Calendar background image; supports built-in themes and custom themes.

Google Calendar Background is a custom calendar background extension that transforms your Google Calendar with beautiful images, colors, and visual effects — making your scheduling experience more personal and visually inspiring. If you've ever wondered "how to change the background on Google Calendar?", this extension is the answer. Choose from ready-made themes or upload your own photos to create a calendar background that matches your style. Every adjustment — from blur to brightness — updates in real time with no save button needed. Custom Google Calendar background — Set any image or solid color as your calendar backdrop with one click Built-in themes — Seasonal color rotations and scenic backgrounds, ready to use instantly Custom themes — Create your own themes with personal photos; support for single image or 12-image monthly rotation Image filters — Fine-tune blur (0–20px), brightness (50–150%), and opacity (20–100%) for the perfect look Light & dark overlay — Choose how calendar text appears over your background for maximum readability Local file upload — Upload images directly from your computer; auto-compressed for optimal performance Real-time preview — See every change instantly, no page refresh required This extension is not affiliated with, endorsed by, or connected to Google or Google Calendar in any way. It is an independent tool developed by a third party. Install this calendar background extension, open Google Calendar, and click the extension icon to start customizing — your background appears immediately. 📚 For usage guide and FAQs, visit: https://google-calendar-background.pages.dev/