At this point, they could not oppose it anyway, so they could only acquiesce to the current situation.

"Ladies and gentlemen, I would like to announce a few things today." After Li Ke waited for the court, he didn't wait for everyone to speak, so he spoke directly.

"Where is the Secretary Provincial Taishi Bureau?" Li Ke said.

"The minister is here." Li Chunfeng, who was standing in the back, stood up.

"Later, I have a set of books on the astronomical calendar, including some books on data calculations, etc., and you can take it back later, and then study it carefully, and then make a new set of calendars." Li Ke directly issued a brand new order.

"Yes!" Li Chunfeng was a little puzzled, but he still bent down and saluted as soon as possible. Didn't His Highness say before that they needed to study these on their own? At this time, has His Highness already studied the data of the new astronomical calendar?

However, what Li Chunfeng didn't know was that Li Ke's change in thinking came from the Xizhou information sent before.

So Li Ke made a change, such as the calendar, Li Ke decided to change it directly with the Tang Dynasty! From now on, the calendar of the Gregorian era of the future generations will be directly taken out.

The Gregorian calendar itself has nothing to do with the Western belief in Jesus Christ, and what Li Ke refers to is the Gregorian calendar year determined by the rotation of the sun into one week.

After giving the finished product, they told Li Chunfeng how to calculate the ecliptic angle, the orbit and other calculation methods, so that they could learn and comprehend by themselves.

The traditional lunar calendar is flawed, in fact, the Tang Dynasty calendar currently uses the "Wuyin Yuan Calendar" founded by Fu Renjun and Cui Shanwei, which has been implemented for a total of 46 years, that is, in fact, the ancient calendar has always become, and later this calendar was corrected by Li Chunfeng for errors and omissions.

It is undeniable that the lunisolar calendar in ancient China is a cultural inheritance, but in fact, until the Tang Dynasty, this calendar was not perfect. More than 1,000 years later, the lunar calendar, which was parallel to the Gregorian calendar, was actually a lunisolar calendar, which was used in 1929.

Therefore, the ancient calendar is not as elaborate as the lunar calendar of more than 1,000 years, and Li Ke made a choice after thinking about it again.

Using the same double calendar parallel method as later generations, since the Tang Dynasty has already used the Tang era, it will be calculated directly according to the Common Era.

For example, the 24 solar terms and other solar terms can be directly added to the Gregorian calendar, which is not in conflict, and the accurate calculation method of the Gregorian calendar is also conducive to inheritance, and the traditional Mid-Autumn Festival and other festivals rely on the complete version of the lunar calendar in later generations.

To put it bluntly, in this world, after the Gregorian calendar era was adopted by Li Ke, even in the modern society more than a thousand years later, the whole world has to admit that this is the Tang calendar!

Li Ke decided to take a two-pronged approach, deciding that the first year of the Gregorian calendar was not only to use cultural influence, but also to use science and technology to influence, even if scientists more than a thousand years later studied it, they had to be amazed, China's ancestors were awesome, so early discovered the Gregorian calendar year with the earth revolving around the sun.

Moreover, it was accurately calculated that one revolution is equal to 365 days, 5 hours, 48 minutes and 46 seconds.

Li Ke was going to calculate the concepts of hours and minutes and seconds as well, although the sexagesimal system of modern time actually came from the ancient Semitic people in the 3rd century BC.

But who got Li Ke used to it? Since he Li Ke is used to it, then everyone has to get used to it, and as for the people of later generations, let them be amazed.

Later definitions of time, for example, a second from the beginning of the pendulum to the atomic second: the transition between the two ultrafine energy orders of the ground state of the cesium 133 atom corresponds to the duration of 9,192,631,770 cycles of radiation.

Because the atomic second is not affected by the environment, it is more accurate, and the atomic second is for scientific research. But the atomic second can't get rid of the astronomical second.

It is not so accurate in daily use, but the time and the unit of measurement in later generations are linked, for example, the length of the swing arm of the second pendulum is 1 meter.

It is not difficult for a craftsman to make a pendulum clock, with which the timekeeping is naturally more accurate, and the gravity-based pendulum clock is naturally more accurate than the current timekeeping through the clockwork.

Li Ke decided to introduce the Gregorian calendar through Li Chunfeng first, and then improve the time and clocks, and build a large bell tower in Chang'an City in the future.

This thing tells the time to the people of the city, and the small pendulum clock is built more and adjusted together, so that the error will gradually decrease.

Anyway, what time it is, it is definitely not as accurate as the positioning through astronomical observation in later generations, but it doesn't matter, it is accurate enough for this era.

In the future, these inventions will be invented by my Datang!

Let the scientists of future generations be shocked.

The research and development of astronomy is too slow, so let's directly produce results, let them absorb and digest it slowly, and when the sandpaper and glass manufacturing process is more advanced, you can take out the telescope, etc., and then provide some tools for Li Chunfeng and them to observe the sky at night.

All in all, Li Ke is ready to put out the Gregorian calendar, hours, minutes, and seconds.

Of course, please call this calendar the Tang Era in the future! Datang Gregorian calendar!

"The Book of the Ministry of Civil Affairs." Li Ke said.

"Yes." Huangfu Lin stood up with a worried face.

"After the end of the Ministry of Civil Affairs, investigate the distribution of pack horses and donkeys to the people of the world, and the horses and mules bred by male donkeys and mares are very suitable for processing, and can replace ploughing cattle to a certain extent, you need to investigate all the relevant data of the people, I checked the data of previous years, and it is very inaccurate."

"In addition to the folk data, I also want to give me a rough statistics on the distribution of animal power in each province of Datang, and I will try my best to find a way to extract a large number of pack horses from Xizhou, Xue Yantuo, Western Turks and other places into the country." Li Ke gave the order directly.

"Yes......" Huang Fu Lin agreed with a bitter face, this work is too tiring. It's not an easy job, but who told the Ministry of Civil Affairs to do this?

"The Ministry of Works." Li Ke spoke again.

"The minister is here." Duan Lun directly stood up as well.

"The Ministry of Industry is responsible for the Tuntian matter, so your Ministry of Industry is also responsible for this investigation on animal power, and you will assist the Ministry of Civil Affairs in the joint investigation, and you must not pass the buck to each other, speed up the efficiency, and before the end of this summer, I want all the data." Li Ke said with a cold face.

"Your Royal Highness......" Duan Lun and Huangfulin were shocked, just a spring and summer? How is this possible!

"Can it be done?" Li Ke directly interrupted their words and asked rhetorically.