Vaccination

EU hints it might not order AstraZeneca jab again

The EU's internal markets commissioner Thierry Breton hinted Sunday that the bloc might decide not to order AstraZeneca's coronavirus jab again following delays in delivering the first batches of the vaccine.

Diseases, Conditions, Syndromes

Europe can achieve herd immunity by July: EU commissioner

Europe could have herd immunity against COVID-19 by July, a European Union commissioner has said, as incoming jabs are expected to speed up the continent's sluggish vaccine rollout.

Vaccination

Germany seeks ways to give its vaccine campaign momentum

Chancellor Angela Merkel and German state governors were planning to talk Monday with representatives of the pharmaceutical industry on ways to beef up the country's sluggish vaccination campaign.

Vaccination

BioNTech-Pfizer pledges up to 75 mn more jabs to EU

BioNTech and Pfizer said Monday they will ramp up their coronavirus vaccine deliveries to the European Union, pledging to send up to 75 million extra doses to the bloc in the spring.

Vaccination

New warning on vaccine supplies sparks EU concern

A warning from AstraZeneca that initial supplies of its COVID vaccinations to Europe will be lower than expected has sparked fresh concern over the rollout of inoculations, forcing some countries to plan for a sharp drop ...

Vaccination

Denmark slows vaccine rollout after Pfizer delivery delays

Denmark announced Wednesday that it was revising its targets for COVID-19 vaccinations down by 10 percent in the first quarter due the temporary reduction in deliveries of the Pfizer/BioNTech vaccine in Europe.

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Calendar year

Generally speaking, a calendar year begins on the New Year's Day of the given calendar system and ends on the day before the following New Year's Day. By convention, a calendar year consists of a natural number of days. To reconcile the calendar year with an astronomical cycle (which could not possibly be reckoned in a whole number of days), certain years contain extra days. Through further insertion of non-day units of time, the calendar year can be further synchronized; however, these extra units of time are not considered part of the calendar.

The Gregorian year begins on January 1 and ends on December 31 with a length of 365 days in an ordinary year and 366 days in a leap year giving an average length of 365.2425 days. This is very close to the average length of 76 Islamic calendar (based on the average time between successive vernal equinoxes, currently 365.2424 days and increasing marginally). Other formula-based calendars can have lengths which are further out of step with the solar cycle, for example, the Julian calendar had an average length of 365.25 days, and the Hebrew calendar has an average length of 365.2468 days.

The astronomer's mean tropical year which is averaged over equinoxes and solstices is currently 365.24219 days, slightly shorter than the average length of the year in most calendars, but astronomer's value changes over time, so William Herschel's suggested correction to the Gregorian calendar may become unnecessary by the year 4000.

This text uses material from Wikipedia, licensed under CC BY-SA