Further to my previous message, some further information about this event is now available. Please note, however, that alterations to the proposed arrangements are still possible, so all information is provided in good faith but without guarantee.
Monday 22 June 2015 (anniversary day). There will be an exhibition of around eight historic and modern tramcars at Alexanderplatz. There will be film, book and model stalls. And Birthday Cake for everyone!
Saturday 27 and Sunday 28 June 2015. Open days at tram depot Lichtenberg (possibly also at U-Bahn workshop Friedrichsfelde). There will be a display of a variety of historic tramcars, souvenir stalls and book and film sales stands.
Sunday 28 June 2015. There will be a grand cavalcade of tramcars through Berlin - further details to follow.
For aficionados of the Berlin tramways, the following dates later this year may also be of interest:
Sunday 30 August 2015. Official opening of the new tramway line between Nordbahnhof and
Chausseestraße, as a result of which lines M8 und M10 will be extended from Nordbahnhof via Hauptbahnhof to Alt-Moabit.
Saturday 12 September 2015. Open day at Kopenick depot on the occasion of Open Monument Day.