Lotus Notes has a decent calendar which can also handle recurring events. Even so, and due to the Power Of Plain Text, I prefer to “manage” anniversaries in a simple text file. That isn’t quite true, but at least I can produce a simple text file, one date per line in DD.MM.YYYY format like so:

28.05.1962 JP
06.09.     Sue

A simple Perl program massages the input into output suitable for an import formula to Lotus Notes:

2005:05:28:JP:Birthday 28.05.1962
2005:09:06:Sue:Birthday 06.09.

That should be stored into a whatever.txt file which can then be imported into Lotus Notes with a suitable COL definition file. The one I use and the Perl program are [available1