Is it a Virus?
4 NO - Safe
Should be located at C:\Users\JohnDoe\AppData\Local\Programs\Notion\notion-calendar.exe
Warning
Multiple calendar sub-processes
Notion may spawn separate processes for calendar blocks, reminders, and sync tasks
Can I Disable?
4 YES
You can close Notion or disable calendar background tasks in Notion Settings (Calendar) or via Task Manager
What is notion-calendar.exe?
notion-calendar.exe is the calendar subsystem of the Notion Desktop app. It powers calendar views, date fields, reminders, and calendar block syncing, running as a dedicated process to keep calendar features responsive while Notion is in use.
This process runs as part of Notion’s Electron-based architecture. It communicates with the main UI and the network layer to fetch calendar data, render calendars, and cache date information for offline access.
Quick Fact: Notion’s calendar features leverage a dedicated runtime to isolate calendar data handling from the main UI.
Types of Notion Calendar Processes
- App Process: Notion main UI and calendar control (1+ instances)
- Renderer Process: Calendar grid rendering for each calendar view
- Sync/Network Process: Data fetch and synchronization with Notion servers
- Background Task: Reminders and date recalculations running in background
- Cache/Storage Process: Local calendar data caching and indexing
- Plugin/Integration Process: Calendar integrations and OAuth handlers
Is notion-calendar.exe Safe?
Yes, notion-calendar.exe is safe when it is the legitimate file from Notion Labs, downloaded from the official Notion site or installed via the Notion Desktop app.
Is notion-calendar.exe a Virus or Malware?
The real notion-calendar.exe is NOT a virus. However, malware sometimes disguises itself using similar names to trick users.
How to Tell if notion-calendar.exe is Legitimate or Malware
- File Location: Must be in
C:\Users\JohnDoe\AppData\Local\Programs\Notion\notion-calendar.exe or near the main Notion executable in C:\Users\JohnDoe\AppData\Local\Programs\Notion\Notion.exe. Any other path is suspicious.
- Digital Signature: Right-click the file in File Explorer -> Properties -> Digital Signatures. Should show "Notion Labs, Inc." as the signer.
- Resource Usage: Normal usage is around 2-15% CPU and 100-400 MB memory per session. Constant excessive usage outside Notion activity is suspicious.
- Behavior: Notion calendar processes should only run while Notion is open or performing calendar tasks. Persistent background activity when Notion is closed is suspicious.
Red Flags: If notion-calendar.exe is found in non-Notion folders, lacks a valid signature, or starts outside Notion, run a full system antivirus scan and verify with official Notion downloads.
Why Is notion-calendar.exe Running on My PC?
notion-calendar.exe runs to support calendar features, reminders, and calendar block synchronization within the Notion Desktop app. It may start when Notion launches or when you interact with calendar blocks.
Reasons it's running:
- Active Notion Calendar Use: You're viewing or editing a calendar block, or using a calendar view, which spawns dedicated calendar processes.
- Calendar Synchronization: Notion syncs calendar data with server-side calendars and reminders to keep data current across devices.
- Notion Startup: Launching Notion starts the calendar subsystem to prepare calendar features for immediate use.
- Background Reminders: Notion schedules reminders that may run in the calendar service process even when the main UI is not focused.
- Calendar Integrations: OAuth or calendar integrations (e.g., external calendars) may instantiate calendar-related processes to handle synchronization.
Can I Disable or Remove notion-calendar.exe?
Yes, you can disable notion-calendar.exe. It is safe to close Notion when calendar features are not needed, and you can disable or limit calendar background tasks or any calendar integrations.
How to Stop notion-calendar.exe
- End Calendar Sub-Process: Open Task Manager (Ctrl+Shift+Esc), locate notion-calendar.exe under Notion processes, right-click -> End Task
- Close Notion: Exit Notion completely from the tray or File -> Exit
- Disable Startup: Task Manager -> Startup tab -> disable Notion
- Disable Background Calendar: In Notion Settings -> Calendar, turn off background syncing or reminders if available
- Limit Extensions/Integrations: Review and disable calendar-related integrations within Notion
How to Uninstall Notion
- ✔ Windows Settings -> Apps -> Apps & Features -> Notion -> Uninstall
- ✔ Notion installer: Run the uninstaller from Notion directory or Start Menu -> Notion -> Uninstall Notion
- ✔ After uninstall, delete any remaining Notion data in: C:\Users\JohnDoe\AppData\Roaming\Notion and C:\Users\JohnDoe\AppData\Local\Notion
Common Problems: High CPU or Memory Usage
If notion-calendar.exe is consuming excessive resources:
Common Causes & Solutions
- Too Many Calendar Blocks Open: Close unused calendar blocks and avoid loading large calendar data sets simultaneously
- Background Calendar Sync Enabled: Disable or limit background calendar synchronization in Notion settings
- Outdated Notion App: Update Notion to the latest version via Help -> Check for Updates
- Heavy Calendar Integrations: Review integrations under Settings -> Integrations and disable or reconfigure heavy ones
- Corrupted Calendar Cache: Reset calendar data by exporting data and clearing local cache folders if available
- Insufficient System Memory: Close other apps, add more RAM, or use Notion with fewer open projects
Quick Fixes:
1. Open Notion and go to the calendar view; close unnecessary calendars
2. Sign out and sign back into Notion to refresh session tokens
3. Update Notion to the latest version
4. Disable background calendar features in Notion Settings
5. Restart your computer if resource usage remains high
Frequently Asked Questions
Is notion-calendar.exe a virus?
No, the legitimate notion-calendar.exe is part of the Notion Desktop app and is located in C:\Users\JohnDoe\AppData\Local\Programs\Notion\notion-calendar.exe. Ensure you download Notion from the official site.
Why is notion-calendar.exe using so much CPU?
High CPU is typically caused by active calendar views or heavy calendar integrations. Use Notion Task Manager (Notion -> Help -> Development) or Windows Task Manager to identify the exact calendar process and disable problematic calendars or integrations.
Can I delete notion-calendar.exe?
Deleting notion-calendar.exe will break Notion calendar features. Uninstall Notion if you no longer need it. Reinstall from notion.so if you return to using it.
Can I disable notion-calendar.exe?
Yes, you can close Notion or disable background calendar tasks. In Windows, you can also disable Notion from starting at startup via Task Manager -> Startup.
Where is notion-calendar.exe located?
Common location is C:\Users\JohnDoe\AppData\Local\Programs\Notion\notion-calendar.exe or alongside Notion.exe. If you find the file elsewhere, verify digital signatures.
How do I reduce Notion calendar memory usage?
Limit the number of calendars loaded, close unused blocks, disable heavy integrations, and ensure Notion is up to date. Use Notion’s settings to minimize calendar features if needed.