By solar reckoning, Spring is held to begin 1 February until the first day of Summer on May Day, with the summer solstice being marked as Midsummer instead of the beginning of Summer as with astronomical reckoning. Germany, the United States, Canada, and the UK), the astronomical vernal equinox (varying between 19 and 21 March) can be taken to mark the first day of spring with the summer solstice (around 21 June) marked as first day of summer. In Brazil, spring months are September, October, November. In Sweden, meteorologists define the beginning of spring as the first occasion on which the average 24 hours temperature exceeds zero degrees Celsius for seven consecutive days, thus the date varies with latitude and elevation.

In Ireland, following the Gaelic calendar, spring is often defined as February, March, and April. In Australia and New Zealand, spring begins on 1 September and ends on 30 November.

In the US and UK, spring months are March, April, and May. Meteorological spring can therefore, start on different dates in different regions. The three warmest months are by definition summer, the three coldest months are winter, and the intervening gaps are spring and autumn. These are determined by the values of their average temperatures on a monthly basis, with each season lasting three months. Meteorologists generally define four seasons in many climatic areas: spring, summer, autumn (fall), and winter. Further information: Meteorological seasons

Spring season