《南齐书·列传·卷五十二》
节气闰日既然有变动，自然应当更改历法，日历纪年常常变化，这都是由于这条历规而造成的。
节闰既移，则应改法，历纪屡迁，实由此条。
Since there is a change in the leap day of the solar terms, the calendar should naturally be changed. The annual calendar often changes, which is caused by this calendar rule.
<s>[INST] For each of the following sets of Classical Chinese and Modern Chinese sentences, provide an English translation that captures the essence of both: Classical: 节闰既移，则应改法，历纪屡迁，实由此条。 Modern: 节气闰日既然有变动，自然应当更改历法，日历纪年常常变化，这都是由于这条历规而造成的。 [/INST] Since there is a change in the leap day of the solar terms, the calendar should naturally be changed. The annual calendar often changes, which is caused by this calendar rule.</s>
For each of the following sets of Classical Chinese and Modern Chinese sentences, provide an English translation that captures the essence of both: Classical: 节闰既移，则应改法，历纪屡迁，实由此条。 Modern: 节气闰日既然有变动，自然应当更改历法，日历纪年常常变化，这都是由于这条历规而造成的。
user
Since there is a change in the leap day of the solar terms, the calendar should naturally be changed. The annual calendar often changes, which is caused by this calendar rule.
assistant