Very useful astronomical calendar

Mozilla Lightning is a calendar plugin for Mozilla Thunderbird e-mail client.  With Lightning it is easy to add network-based calendars very easily.  this calendar has important astronomical dates and is very useful: http://cantonbecker.com/astronomy-calendar/

I’ve seen other calendars for astronomical dates however they had problems.  One main problem is that they don’t have the exact times for major astronomical events, such as solstices and equinoxes.  Even worse, with some the actual date of astronomical events can be wrong because if the time of the event does not get converted from Universal Coordinated Time to your local timezone, it can then show up on the wrong day.

But this calendar listed above works perfectly, lists equinox and solstice events with the correctly converted local times and dates, as well as Mercury retrograde dates and solar eclipses.