Leap years have $$366$$ days; all other years have $$365$$ days. Each $$4$$th year ($$1904$$, $$1908$$, $$1912$$, and so on) was a leap year.  Britain celebrated the start of the $$20$$th Century on $$1$$st January $$1901$$ and the start of the new Millennium on $$1$$st January $$2000$$ , $$99$$ years later. Calculate the number of days from one date to the other inclusive. 
Overseas Competition->Knowledge Point->Word Problem Modules->Periodic Problems->Periodic Problems of Time->Period of Dates