When Is Spring? Equinox Date, Meteorological Spring, and Hemisphere Guide

Spring in the Northern Hemisphere begins on two widely used dates: meteorological spring starts March 1 every year, while astronomical spring begins around March 20 at the vernal (spring) equinox (exact instant varies slightly by year and timezone). If you searched "when is spring," "first day of spring," or "spring equinox date," clarify which convention — both answers are legitimate.

This guide explains meteorological vs. astronomical spring, 2026 equinox timing as a reference year, Southern Hemisphere reversal, overlap with daylight saving time, and how people plan gardens, travel, and holidays around the season.

Quick Answer: When Does Spring Start?

| Convention | Northern Hemisphere | Southern Hemisphere |

| --- | --- | --- |

| Meteorological spring | March 1 (through May 31) | March 1 autumn |

| Astronomical spring (vernal equinox) | ~March 20 (±1 day some years) | ~March 20 autumn equinox |

Season start dates are scientific and calendrical conventions — not U.S. federal holidays. Work and school schedules do not automatically change on March 1 or the equinox.

Meteorological Spring — March 1

Climate scientists use fixed three-month blocks:

| Season (Northern Hemisphere) | Months |

| --- | --- |

| Spring | March, April, May |

| Summer | June, July, August |

| Fall | September, October, November |

| Winter | December, January, February |

Meteorological spring always begins March 1 — in 2026, that is Sunday, March 1, 2026, running through May 31, 2026.

Benefits: clean monthly datasets for temperature averages, frost probabilities, and drought monitoring without splitting months at equinoxes.

Astronomical Spring — Vernal Equinox (~March 20)

Astronomical seasons track Earth's axial tilt relative to the sun:

• Vernal equinox — sun crosses the celestial equator northward; day and night nearly equal globally.
• Typical Gregorian date: March 19, 20, or 21 depending on year and leap-year cycle.

2026 reference: The March equinox occurs March 20, 2026 at approximately 14:45 UTC. Many U.S. time zones observe Friday, March 20, 2026 as the equinox civil date.

Spring ends astronomically at the June solstice (~June 20–21) when summer begins — while meteorological summer starts June 1. The mismatch is expected.

Southern Hemisphere — Seasons Reversed

March brings autumn, not spring, south of the equator:

| Event (March 2026) | Northern Hemisphere | Southern Hemisphere |

| --- | --- | --- |

| Meteorological season from March 1 | Spring | Autumn (fall) |

| Equinox ~March 20, 2026 | Spring equinox | Autumn equinox |

Global articles should name the hemisphere to avoid sending Australian readers into spring planting when they need harvest planning.

Spring Overlap: Easter, DST, and Holidays (Northern Hemisphere)

Spring hosts moveable and fixed events — planning uses March–May window:

| Event | Typical timing | 2026 example |

| --- | --- | --- |

| Daylight saving begins (US) | Second Sunday in March | March 8, 2026 — before equinox |

| Vernal equinox | ~March 20 | March 20, 2026 |

| Easter (Western) | Moveable | April 5, 2026 |

| Mother's Day (US) | Second Sunday in May | May 10, 2026 |

| Memorial Day (US) | Last Monday in May | May 25, 2026 |

US daylight saving starts March 8, 2026 — clocks spring forward before the equinox, making evenings lighter early in meteorological spring.

How People Celebrate and Plan for Spring

Gardening and lawn care

• Last frost dates — consult local extension maps; March 1 is not safe to plant tender crops everywhere.
• Soil prep and pruning — late winter/early spring window depending on species.
• Allergy planning — pollen rises March–May; track local counts after equinox warmth.

Cleaning and home maintenance

• Spring cleaning culture peaks March–April, tied more to temperature rise than equinox minute.
• HVAC switch from heat to cool; gutter repair after winter ice.

Travel

• Spring break (U.S. schools) scatters March–April — beach and theme-park prices spike.
• Cherry blossom festivals (e.g., Washington, D.C.) track bloom forecasts, not fixed March 20 — peak can be late March or early April yearly.

Wildlife and outdoors

• Daylight lengthens fastest around equinox — evening walks and youth sports shift schedules.
• Bird migration and daylight saving together change apparent wildlife activity times — adjust feeders if clocks jump March 8 in the U.S.

Religious and cultural observances

• Nowruz (Persian New Year) — often equinox-linked (~March 20).
• Holi, Passover, Ramadan — lunar or lunisolar calendars; dates move within spring some years — confirm annual calendars separately from equinox.

Meteorological vs. Astronomical — Which Should You Use?

| Use case | Better convention |

| --- | --- |

| Weather records, NOAA reports | Meteorological (March 1) |

| Astronomy education, equinox events | Astronomical (~March 20) |

| Retail "spring collection" | Often March 1 or even February marketing |

| Garden planting | Local frost data — neither convention replaces zone maps |

There is no single "correct" spring for all purposes — state which you mean.

FAQ: Common Mix-Ups

When is the first day of spring?

March 1 (meteorological) or ~March 20 (vernal equinox) in the Northern Hemisphere.

Is spring always March 20?

Only astronomical spring centers on the equinox, which is usually March 20 or 21 (sometimes March 19). Meteorological spring always starts March 1.

When is spring 2026 specifically?

• Meteorological: March 1, 2026
• Equinox: March 20, 2026 (approximate global instant)

Does spring start with daylight saving time?

No. US DST begins March 8, 2026 — before meteorological and astronomical spring markers, but culturally associated with "lighter evenings returning."

When does spring end?

Meteorological: after May 31. Astronomical: at June solstice (~June 20–21).

What season is March in Australia?

Autumn — Southern Hemisphere seasons oppose the north.

Bottom Line

Spring begins March 1 (meteorological) or around March 20 (vernal equinox) in the Northern Hemisphere — specify which system you use. Southern Hemisphere experiences autumn at the same times. Spring is not a public holiday; plan gardening, travel, and allergies with local frost and pollen data, remember US clocks spring forward March 8, 2026, and treat Easter and other lunar holidays as separate moveable dates within the spring months.