Joint Analysis Seminar Caltech/UCLA 
Lex seminarii 

1) Timing
During the academic year, the joint seminar is held twice a month. On the first Friday of every calendar month, provided it falls in the academic year, the joint seminar is held at Caltech. On the third Friday of every calendar month, provided it falls in the academic year, the joint seminar is held at UCLA. At UCLA, The seminar starts at 3 pm, at Caltech, the seminar starts at 3.20 pm. The seminar lasts for one or two hours, with at least a 15 min break in the latter case.
2) Lecturers
For every event, both Caltech and UCLA are equally responsible for inviting the speaker(s). The default is that each sides has one of the possible two slots available, the guest side has the first and the host side the second speaker. There is no need to have two lectures, so one side can opt out of presenting a speaker without the event being cancelled. (The event is cancelled if no one presents a speaker). Occasionally, one side will present both speakers, if the other side agrees. At least one webpage containing the coordinates of every scheduled lecture will be maintained as soon as the information becomes known. Occasionally one (very rarely two) of the lectures could be a graduate student's presentation meant mainly for a graduate student's audience.
3) Dinner
Often a number of participants will be interested in dinner with the speaker(s) in a nearby restaurant. Six o'clock is a good time.
4) Miscellaneous
All involved faculty try to avoid scheduling courses after 2pm on Fridays.