Free · Compare two days in one place

Daylight Comparison Tool

Compare daylight length, sunrise, and sunset between two dates at the same location.

  • SunCalc 2 astronomy
  • Private in your browser
  • JSON and CSV downloads

Compare daylight

Use the sample place or enter coordinates. All times use the chosen time zone.

1
Choose place and timeCoordinates stay on this device
2
Read the sky planToronto · America/Toronto
Your local result will appear hereUse the sample place, then press the gold button.

Three simple steps

How to use it

  1. Choose two dates and one place.
  2. Read the daylight difference.
  3. Compare sunrise and sunset shifts.

Your place stays on this device

SunCalc does the sky math inside this browser tab. Bookify does not upload or save coordinates, dates, or times. Results assume a clear, level horizon; terrain, weather, and buildings can change what you see.