darthcamaro writes with this news from InternetNews: "Mozilla's Calendar effort has been in a tailspin for years as Firefox and more recently Thunderbird, have been actively pushed forward. Mozilla Lighting which is a calendar add-on for Thunderbird is finally hitting home with a 1.0 release as soon as September 27th. '"We're going to bite the bullet and call either our next release or the one after 1.0," Mozilla developer Philipp Kewisch blogged. "Afterwards we can newly decide on version numbers and I'll tell you one thing: I'm not going to go into the version number trap again. If at some point the next available version number is 2.0, then that's the way it is."'"