On reflecting that historians (and others) doubt that December 25 is Jesus' birthday,
an intriguing UB dissemination opportunity arises for certain public venues
(cafés, cafeterias, coffee shops, community centers, ...)
Host a "Today is Jesus' Birthday!" table, offering free birthday cake and drinks.
The purpose is to inspire discussion without proselytizing the UB; materials
that discuss other dates could be shared - even a pamphlet that summarizes
the different theories currently proposed.
The theme is a lighthearted "Have cake and celebrate with us!"
(some visiting males named "Jesus" may have the same birth day
.. and arrive ready to celebrate anyway)
Note: Pictures of Jesus may detract from the ambience since
they immediately create a religious theme when the intent
is casual reflection on the birth day possibilities.