Solar time 2021, when it changes: hands backwards between today and Sunday

Standard time 2021, when does it change? Tonight. Between Saturday 30 October 2021 and Sunday 31 October, hands back one hour at 3 am. A change that will allow us to sleep 60 minutes more on the weekend, but in general we lose an hour of light. Summer time will instead be effective again from March 27, 2022. According to data from Terna, the company that manages the national transmission grid, in the 7 months of summer time the Italian electricity system benefited from lower consumption for 450 million euros. kWh, equal to the value of the average annual requirement of approximately 170 thousand households, with a consequent economic saving of approximately 105 million euros. Positive effects also in terms of environmental sustainability: the lower electricity consumption, in fact, has allowed the country to avoid CO2 emissions into the atmosphere for about 215 thousand tons. The economic benefit is calculated considering that this year, in the summer time period that began on Sunday 28 March and will end on Sunday 31 October, the cost of the average kilowatt hour for the ‘typical domestic customer in protection’ (according to Arera data) was approximately 23 euro cents before tax. From 2004 to 2021, according to the analysis of the company led by Stefano Donnarumma, the lower consumption of electricity for Italy due to summer time was approximately 10 , 5 billion kWh and has resulted in savings for citizens of over 1.8 billion euros in economic terms. In the spring-summer period, the months that mark the greatest energy savings are April and October, since moving the hands forward by one hour delays the use of artificial light at a time when work activities are still in full swing. carrying out. In the summer months, the ‘delay’ effect in switching on the light bulbs occurs in the evening, when the work activities are mostly finished and results in less evident values ​​in terms of electricity savings. Daylight saving time will be effective again from March 27, 2022.