How to Calculate Daylight Hours with OpenClaw
Daylight hours with OpenClaw and ToolRouter. Day length calculations for any location.
Tool
OpenClaw processes sunrise and sunset queries as automated data operations, returning precise times and complete twilight phase data in structured formats suitable for batch scheduling systems, solar energy forecasting pipelines, or construction site management platforms. It handles multi-location and multi-date queries efficiently in a single pass, making it the right tool for operational planning at scale where daylight availability drives scheduling decisions across many sites or dates.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsSteps
Once connected (see setup above), use the Sunrise Sunset tool:
- Ask OpenClaw: "Get sunrise and sunset for this location today"
- OpenClaw returns precise times
- Calculate the total daylight from the results
Example Prompt
Try this with OpenClaw using the Sunrise Sunset tool
How many daylight hours does Tokyo get today? Compare with next month.
Tips
- Compare across dates to see how quickly day length changes
- Factor in twilight for usable outdoor light beyond sunrise-sunset
- Useful for travel planning and understanding seasonal patterns