Equinii and Solsticsesss, m'preciousss

[davem]

As to the significance of March 25th:

In his essay 'The Chronology of Middle earth', Tony Steele writes(after a long, highly complex analysis of Tolkien's calendars:

The total number of days for the years of the Sun during the First Age was 217,961. In brief, the calendar rules for the Reckoning of Rivendell are as follows - leap years occurred every twelfth year, & were always treble-leap-years (368 days). 144 years made a yen, & in the last year of every third yen the three extra days were omitted. We can therefore state with confidence that the first uprising of the Sun occurred on the following date:

25th March 10,160 BC

Make of that what you will!