In Spain, this change of cycle will have a direct impact on both the daily rhythm of the population as in the calendar: from the length of the days to the dates of the Easter or the traditional change to summer time. All of this revolves around a key moment in March that, year after year, never falls on exactly the same day or at the same time.
What exactly is the spring equinox?
The spring equinox is the moment when the Sun crosses the celestial equatorThat is, the imaginary line that extends the Earth's equator onto the celestial sphere. At that moment, the sun's rays strike the equatorial zone of the planet almost perpendicularly, so the length of day and night is practically the same at almost all latitudes.
The term equinox comes from Latin aequinoctium, meaning “same night”It's not an isolated event: it happens twice a year. In March it marks the beginning of spring in the northern hemisphere and autumn in the southern hemisphere, while in September the opposite happens: autumn begins in the Northern Hemisphere and spring in the Southern Hemisphere.
On the physical plane, during the equinox the The Earth's axis is not tilted either towards or away from the SunTherefore, both hemispheres receive a very similar amount of radiation. From that point on, in the northern hemisphere, the days begin to lengthen rapidly and the nights shorten, a process that will culminate at the summer solstice with the longest day of the year.
This balance of light and darkness also has a symbolic dimension. Since antiquity, it has been seen as a milestone of renewal and beginning of a cycle, linked to sowing, to the awakening of landscapes and, in general, to a collective feeling of "starting up" after the coldest months.
When will the spring equinox of 2026 be?
In 2026, astronomical spring in Spain will begin Friday, March 20According to the usual calculations of National Astronomical Observatory According to the National Geographic Institute, the equinox will occur at 15:46 PM in mainland Spain, which is equivalent to 14:46 in the Canary Islands.
That moment marks the official start of the new season throughout the North HemisphereWhile we're welcoming spring here, on the other side of the equator, in countries of the Southern Hemisphere, autumn is beginning. It's the same phenomenon, but experienced in opposite ways depending on our latitude.
From the equinox onwards, the length of the day increases significantly. At the typical latitudes of the Iberian Peninsula, the Daylight hours increase by almost three minutes each dayThe sun rises approximately one and a half minutes earlier and sets one and a half minutes later than the previous day, a change that, although everyday, accumulates quickly.
Spring 2026 will have a Approximate duration of 92 days and 18 hours, extending from March 20th until 21 June, the date on which the summer solstice will occur and the next astronomical season will begin in the northern hemisphere.
Why does the date change every year?
Although the arrival of spring is popularly associated with March 21.The truth is that the astronomical start can occur between the 19th, 20th, or 21st of that month, depending on the year. The reason is that the Gregorian calendar It does not perfectly match the actual time it takes the Earth to complete an orbit around the Sun.
The calendar year has 365 days (366 in a leap year), but the tropical year—related to the cycle of the seasons—lasts approximately 365 days and almost six hoursThis difference necessitates periodic corrections through leap years, but even so, the exact moment of the equinox shifts slightly over time.
For this reason, it is necessary to consult astronomical data every year to know the precise date and time of the beginning of spring. During the 21st century, the start of the season in the Northern Hemisphere has always fallen between March 19 and 21. 2003 saw one of the latest starts, while springs beginning earlier are expected towards the end of the century.
In any case, one constant remains: the new season always begins when the Sun crosses the so-called vernal point, the intersection between the ecliptic and the celestial equator, which marks the transition to a period with more light in the northern hemisphere and more darkness in the southern.
Equinox, solstice and duration of the seasons
The difference between equinox and solstice has to do with the relative position of the Earth and the SunAt the March and September equinoxes, the sun illuminates both hemispheres almost symmetrically, and the duration of day and night approaches 12 hours across almost the entire planet.
At the June and December solstices, the opposite occurs: one of the hemispheres reaches its maximum tilt towards the Sun (summer solstice) while the other is further away (winter solstice). On these dates, the longest and shortest days of the year are recorded, with the greatest differences between hours of daylight and darkness.
Throughout 2026, the seasonal calendar will be marked by four very clear milestones: the spring equinox of March 20, the Summer solstice on June 21st, the autumn equinox planned for the September 23 and the winter solstice around December 21Each one of them marks the beginning of a different astronomical season.
In terms of duration, the Spring is one of the longest seasons of the year in the Northern Hemisphere, only slightly surpassed by summer. At around 92-93 days, it is ahead of autumn and well above winter, which is usually the shortest season due to the shape of Earth's orbit.
Astronomical spring and meteorological spring
It is convenient to differentiate between astronomical springwhich begins with the March equinox and ends with the June solstice, and the meteorological springThis period is used by meteorological and climatological services. It covers the entire months of March, April, and May, with a primarily statistical and data analysis objective.
While the astronomical definition is based on the Earth's position relative to the SunMeteorology prioritizes the homogeneity of periods to allow for comparison of temperature, precipitation, and other climatic parameters over the years. Therefore, from the perspective of actual weather, the "official" spring for meteorologists begins on March 1st.
In Spain, this season is characterized by a high atmospheric variabilityCool, rainy days are typically followed by warmer, sunnier periods, especially in the first few weeks after the equinox. The average temperature on the Iberian Peninsula is around 12-13°C, and accumulated rainfall is usually around 185 mm, with March and April being among the wettest months.
Seasonal forecasts indicate that spring 2026 will be, overall, a little warmer than usual across much of Spain. The most likely scenario places temperatures in the upper third of historical averages, with a more pronounced anomaly in the Balearic Islands, the northwest of the Iberian Peninsula, and eastern regions. As for rainfall, generally average values are expected, although areas such as the southwest of the Iberian Peninsula or the Canary Islands may receive slightly less precipitation than normal.
Impact of the equinox in Spain: light, weather and daily life
Beyond the astronomical data, the arrival of the equinox is noticeable on the street. After several weeks of an atmosphere typical of the end of winter, the Landscapes begin to change in appearanceThe fields turn green, the trees sprout, and many plant species begin to bloom, something especially visible in areas like the Jerte Valley with the cherry trees in bloom.
The increase in daylight hours is clearly noticeable. Right after the equinox, the days lengthen at a rate of around three additional minutes of clarity each dayThis increase is often associated with a better mood and a greater desire to engage in outdoor activities. However, this same process also brings some less pleasant consequences for a portion of the population.
The increase in solar radiation and the awakening of vegetation result in a rise in the pollen levels in the air. In Spain, millions of people suffer allergy symptoms, particularly from grasses and other species that release large amounts of pollen in spring. The intensity of these episodes depends both on the dominant plant species in each region and on weather patterns.
Furthermore, spring opens the door to a change of daily habitsTerraces, rural getaways, and outdoor activities are becoming increasingly popular, taking advantage of the fact that summer's peak temperatures and large tourist crowds haven't yet arrived. However, the weather can still be unpredictable, so it's advisable to keep checking the forecast before making outdoor plans.
Equinox, Easter and festive calendar
The spring equinox not only marks the beginning of a season; it also establishes the reference point from which various things are calculated movable dates of the religious calendar, with special relevance for Holy Week in Spain and other countries with a Christian tradition.
To determine Easter Sunday, the starting point is taken from first full moon after the spring equinoxThe Sunday following that full moon is considered Easter Sunday, and the Sunday immediately before the full moon is Palm Sunday, which opens Holy Week.
In 2026, the first full moon of spring will take place on Thursday April 2According to the traditional rule, the Easter Sunday will be celebrated on April 5th, Whereas the Palm Sunday will be on March 29thThus, Holy Week that year will run from March 29 to April 5, affecting both the work calendar and the planning of trips and celebrations throughout the country.
This computing system, in use for centuries, illustrates how a purely astronomical phenomenon, such as the equinox, continues to have a direct impact on social organization current trends, from school holidays to hotel occupancy and economic activity linked to tourism.
The time change and summer time
Closely linked to the increase in daylight hours after the spring equinox is the Time change to summer time, still in effect in Spain and most of Europe. This time adjustment theoretically aims to make better use of daylight in the evenings and reduce energy consumption, although its actual effectiveness has been questioned in recent years.
In accordance with European regulations and the provisions contained in the State official newsletterIn 2026 the time change will take place early morning of Saturday, March 28 to Sunday, March 29At 2:00 a.m., clocks will be moved forward to 3:00 a.m. in mainland Spain and the Balearic Islands, while in the Canary Islands the adjustment will be made from 1:00 a.m. to 2:00 a.m.
This advance implies that, on that specific night, sleeps one hour lessAlthough from then on the evenings are noticeably longer, reinforcing the feeling that the days are more productive. Clocks will remain on summer time until the last Sunday of October, when the reverse change will take place to return to winter time.
The debate about whether or not to maintain these time changes remains open. Some experts highlight possible negative effects on sleep and healthEspecially in vulnerable groups such as children or the elderly, while others argue that the current energy and economic impact is limited. At the political level, proposals to review or eliminate this system have been put forward on several occasions, although for the time being it continues to be used.
Cultural and symbolic meaning of the equinox
For millennia, the spring equinox has been interpreted as a a time of rebirth and renewalMany cultures have associated it with the beginning of the agricultural year, with sowing, and with the celebration of the return of light after winter. In ancient civilizations, the social and religious calendar was closely linked to these kinds of astronomical milestones.
There are numerous examples of buildings and monuments aligned with the Sun at the equinoxes. One of the best-known cases is the Pyramid of Kukulkan in Chichen ItzaIn present-day Mexico, around the spring equinox, a play of light and shadow simulates the descent of a serpent down the main staircase. This phenomenon demonstrates the advanced astronomical knowledge of the Mayan civilization and their interest in precisely marking the changing seasons.
Megalithic structures and temples have also been identified in Europe that show significant alignments with sunrises or sunsets at key times of the year. Although in many cases the precise symbolism has been lost, the recurrence of these orientations reinforces the idea that The equinoxes and solstices have been reference points fundamental for the organization of time and community life.
Today, beyond specific beliefs or rituals, the equinox continues to function as a collective milestoneIt marks a kind of "change of mindset" in the citizenry: outdoor activities are revived, getaways are planned, spring festivals and traditional celebrations begin, and in general the social calendar becomes more intense as the season progresses.
How to prepare for the new season
The arrival of the equinox and spring invites us to introduce small adjustments to the routineWith longer daylight hours, it's common to reorganize schedules to make the most of the evenings, both at work and in personal life. Activities like walking, playing sports outdoors, or simply spending more time on terraces and in parks become more frequent.
At the same time, it is advisable not to neglect certain aspects of Health and WellnessIt is advisable to start using sun protection even on seemingly mild days, monitor exposure to insects in natural environments, and pay attention to pollen levels in people with allergies, consulting the advisories available from health and meteorological services.
On a practical level, spring is an ideal time to carry out weekend getaways or short holidays, since many destinations are less crowded than in the height of summer. The milder weather is ideal for hiking, rural tourism, and visits to natural areas, which are especially vibrant at this time of year.
Despite this generally pleasant image, the season can still bring rain, occasional drops in temperature, or sudden weather changes. Therefore, having up-to-date weather information before planning outdoor activities remains a good way to avoid surprises.
The combination of spring equinox, the lengthening of the days, the adjustment to summer time and the start of the Easter festive cycle This makes the weeks following March 20, 2026, a particularly marked period of transition in Spain. In just a few days, astronomical, social, and everyday changes unfold, reshaping schedules, habits, and perceptions. It all begins at a very specific moment when light and darkness reach equilibrium and the Earth is once again positioned precisely to mark the start of a new spring in the Northern Hemisphere.
