Seasons Calculator
Result
Seasons Calculator (Equinox & Solstice) March Equinox is a everyday life calculator that helps you calculate march equinox values from your input data. The formula used is: Equinox/solstice instants from Meeus' algorithm (mean time + 24 periodic correctio — free online calculator.
Formula
- Seasons Calculator calculates its result from Year. It uses the formula Equinox/solstice instants from Meeus' algorithm (mean time + 24 periodic correction terms). Change any input to recalculate the result instantly.
- The main inputs are Year. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Seasons
- Year: 2026
Using Year = 2026, the calculated result is March equinox: 2026-03-20 | June solstice: 2026-06-21 | September equinox: 2026-09-22 | December solstice: 2026-12-21.
Sample result: Calculating…
Frequently asked questions
What does the Seasons calculate?
Seasons Calculator (Equinox & Solstice) March Equinox is a everyday life calculator that helps you calculate march equinox values from your input data. The formula used is: Equinox/solstice instants from Meeus' algorithm (mean time + 24 periodic correctio — free online calculator.
Which values should I enter?
Enter Year using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Equinox/solstice instants from Meeus' algorithm (mean time + 24 periodic correction terms).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.