Science Time change 2021: what day of March is changed to daylight saving time
The
daylight saving time
comes this Sunday with the first time change 2021. Thus,
at 02.00 hours in the morning of Saturday to Sunday will be necessary to advance the clocks to mark 0300 hours
, so the day will " an hour less".
Thus, from that same Sunday, March 28, it will
dawn and dusk later
.
But since when do we change the time?
Does it affect the human body?
When will the decision to set a single time come?
These are all the keys
First time change in Spain
In
Spain
the
summer time was first adopted in 1918
for economic and political reasons, according to a published article by Dr. Pere Planesas Physics in the Yearbook of the Astronomical Observatory of Madrid.
The decision was made
due to the coal shortage
caused by the First World War
and to harmonize the schedule with that of neighboring countries
.
Comings and goings with the time
In the first half of the 20th century, the official time "was applied discontinuously and with little consistency in the dates", first as a result of the
civil war of 1936-39
and, later, of the
Second World War
, but after the
In the oil crisis of the 70s
, summer time was reinstated in many European countries - Spain did so from 1974 - and since 1980 it has been dependent on European directives, says Planesas.
Does it help to change the time?
In recent years, various experts in the field have defended the need to set a time and keep it throughout the year since
differentiating between winter and summer time "could make sense until forty or fifty years ago but not so much now"
when, As
Ricardo Irurzun
, from Ecologistas en Acción,
explained to Efe
, as a result of the last time change, "there is no way to verify whether or not energy is saved" since there are no estimates "in a well-studied way" in recent years in this regard.
What is proven is that
the variation in the hours of light that the human body receives affects its organism
and "although we adapt quickly to a change of this type", when it is forced for reasons unrelated to biology "there is a deregulation of hormonal levels "which implies, among other things, a decrease in melatonin or" sleep hormone ", which affects both the rest and the performance of the person.
This has been confirmed to Efe by the expert in neurovascular research of the Higher Council for Scientific Research (CSIC), Ricardo Martínez, who also recalled that
people with psychotic disorders
, such as those who suffer from manic-depressive psychosis, "spring feels fatal , since his state of mind worsens among other reasons for having more hours to think ".
What about the European Commission's decision to set a single schedule?
In this situation, the
European Commission
announced in 2019 its intention to put an end to the changes definitively, so that
each European country could choose which time it preferred for the whole year
, and the European Parliament chose 2021 as the moment in which the new regulations would come into force.
But, as happened with many other provisions, the health crisis and the confinements since March 2020 altered the calendar by generating a significant delay in the debate and the regulation process and, to date,
it does not seem that this year will be the one to say goodbye to the time change
: in fact, we already know that on October 31 we will recover the "60 minutes lost" by resuming winter time.
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