Here's some notable anniversaries for this month.
30 Years Old This Month
Monty Python's The Meaning of Life - This is often overlooked in the MP filmography, but it's my personal favorite. It's the one that best captures the tone of show - a bunch of sketches that are barely related if at all. And most of the skits are supremely memorable. I can't tell how often I've had to stop myself from belting out "Every Sperm is Sacred" at the bus stop. It also has the most satisfactory ending of the proper MP films, in my opinion (Life of Brian was a downer and Holy Grail was anticlimactic).
50 Years Old This Month
The Birds - I wanted to mention this because it is such a cinema classic, and it is well done. But I don't have much more to say because, honestly, I had a huge problem with it. Namely - I want to know just why the hell the birds are acting that way. It's never even hinted at in the film, and everyone I've asked who read the original book say there's not much more there. This isn't Jaws, where it's just an individual animal being a super-persistent predator. They aren't the Jurassic Park raptors, who are straight-up sadists. I'd probably buy any explanation at this point, as long as it was explained.
These will ramp up as we get into the summer months.