First I thought, "ah again someone that posted before searching" but now after 2 hours of browsing I feel
- you are totally right. It seems that there is currently no supported calendar mod anymore let alone an "out of the box" calendar mod available for phpbb3 boards.
There is a widely used old mod: http://www.phpbb.com/community/viewtopi ... 4&t=666195
but phpbb officially discourages normal users from using it http://www.phpbb.com/community/viewtopi ... p=13136840
There is a kind of add-on being developped but that does not really integrate in phpbb: http://www.phpbb.com/community/viewtopi ... &t=2149653
In the same line you have Google with his calendar and other big players that offer to embed their calendar on a website but those obviously don't integrate in phpbb and you need to enter e.g. all birthdays anew in those calendars and also find a way to present them / integrate them in the design.
It is quite unfortunate that phpbb itself does not offer what I had considered as a standard feature of a board. It might be in some cases enough to just chat, but finding dates and making appointments is quite a commonly needed feature in communities. Funny that there is a calendar for birthdays, but no user interface. Creating that bridge seems to be not an easy job for an external guy, as he has to keep up with every phpbb change because of the symbiotic character of a calendar mod.
So I suppose that's the reason why there is no calendar available for phpbb anymore.
Those that were offering mods have retired and the pros around here know how to fix and adapt the fragments they left behind. You can give it a try yourself by reading the 100 pages you will find following the above link to the alightner calendar and googling for further help and last but not least doing a php crashcourse wouldn't hurt either...
But for the rest of us I guess that means: let's forget the calendar or use another board or cms...