oriel36 scrive:


Every time I see the explanation which has 366 rotations in 365 days it
makes me shake my head,I wonder what happens when they encounter the
leap year from Mar 1st 2011 until Feb 29th 2012 which have 366 days in
it ! -

OK, enough is sufficient.

1 day equals one rotation of the earth on its axis.
1 year equals one rotation of the earth around the sun.

Human devised timing systems (clocks and calendars) are a rough
approximation of these things, They are not the same and they are not
equal.

Dividing one rotation of the sun by one rotation on the earth's axis does
not result in a whole number. Consequently, in an effort to keep the
human calendar roughly aligned with the seasons we add a leap day every
four calendar years.

That is all there is to it. It does not merit a lengthy treatise every
few weeks with futile attempts to compare a real day with the human
devised clock.
The earth rotates once each day, 365 times in 365 days, and 366 times in
366 days when we add a leap day to the calendar year (not to be confused
with a real year).

--
Gianna
Peterhead, Scotland

buchan-meteo.org.uk