Days Until Spring
Calculate how many days remain until spring begins.
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Enter your values and click Calculate
How It Works
The calculator reads today's date with JavaScript's new Date() and constructs a target set to March 20 of the current year — month index 2 in JavaScript's zero-indexed system. If today is already past March 20, the year is incremented so the countdown always aims at the next occurrence. The difference between the target and now is measured in milliseconds, divided by 86,400,000, and rounded up with Math.ceil so that any remaining partial day counts as a full day.
Examples
Deep Winter
Running the calculator on January 15th.
Result: Shows approximately 64 days until spring.
Day After Spring Starts
Running the calculator on March 21st.
Result: Shows approximately 364 days until next spring.
Late Autumn
Running the calculator on November 1st.
Result: Shows approximately 139 days until spring.
Frequently Asked Questions
When does spring officially begin?
Spring begins on the vernal equinox, which falls around March 20th or 21st each year in the Northern Hemisphere. The exact date shifts slightly due to the difference between the calendar year and Earth's orbital period.
Does this account for the exact equinox time?
This calculator uses March 20th as a fixed approximate date rather than computing the precise equinox moment, which varies by a few hours each year. For most purposes this approximation is accurate to within one day.
Does this work for the Southern Hemisphere?
No. In the Southern Hemisphere, spring begins around September 22nd — the Northern Hemisphere's autumnal equinox. This calculator is calibrated for the Northern Hemisphere.