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BRAZILIAN FILM: As we've already warned you, the Brazilian Film Festival of London (Braff London) kicks off today at the Odeon Covent Garden and runs until 1 October
GET YOUR TATS OUT: The International London Tattoo Convention returns to Tobacco Dock today, featuring live bands, burlesque acts, exhibitions, competitions, beer and a mobile show from the Amsterdam Tattoo Museum. £20-£30, book ahead, 11.30-1am
TALK ART: Around 20 artists will display and discuss their work during the day at Space Station Sixty-Five on Kennington Road, under the title Bodies That Matter. Free, just turn up, 2.30-8.30pm
SCIENCE UNCOVERED: Head to the Natural History Museum for a special late-night event, part of European Researchers' Night. See behind the scenes, chat to scientists, catch science talks, tour some secret places and sample fabulous food and drink. Free, just turn up, 4pm-midnight
FILM: The Curzon Soho screens In The Name Of, a film looking at homosexuality in the Church and one of the first openly gay films to be made in Poland, with an introduction by the director. £13.75, just turn up, 6.20pm
AQUARIUM LATE: Head to the London Aquarium after hours to meet penguins, sharks, turtles and stingrays plus there'll be gourmet street food stalls, a fully stocked bar and DJ. £15, book ahead, from 6.45pm
REGULAR MUSEUM LATES: Unwind after work with a spot of culture at the British Museum, National Gallery, Tate Modern, Royal Academy or National Portrait Gallery. Free, check websites for closing times and events
BASKETBALL: It's the first London Lions basketball game of the season, against the Manchester Giants. It all takes place at The Copper Box. £12.45 + bf, prebook, 7.30pm
ROLLER SKATE: The Friday Night skate starts at Wellington Arch. Anyone who feels competent on skates is welcome to join. Free, just turn up, 8pm
PREHISTORIC PARTY: Lost Valley of the Power Ballads takes place at the Bethnal Green Working Men's Club tonight. It's being billed as "power ballads with dinosaurs". Oh, and apparently, there's a live volcano. £4 advance online, £6 before 10pm, £8 after 10pm
Good Cause of the Day
Precinct Theatre has been supporting its local community in Islington for 10 years, with drama workshops, dance classes and performances particularly for children and young people from the local estate. But its venue is being demolished and they need help moving from their current location in Packington Square N1 to near Old Street today and tomorrow. If you can help with packing or shifting, just turn up at Units 2/3 Packington Square between 10am-7pm today and from 9am on Saturday. And if you feel like donating to help them find a new space, there's an Indiegogo appeal.
London Connection Puzzle
Your complete set of clues, then, is 38, 24, 11 and 9. What's the London connection? Lots of people have worked it out, so no need to email in. The solution will be revealed on Monday.
From the Archive
On this day last year, we learnt which London institution has the world's longest Facebook timeline, and previewed a 'human butchery' opening in Smithfield.
London Weather by Inclement Attlee
Today's forecast is brought to you via the medium of mime. Unfortunately, it doesn't translate very well into the electronic format, so you'll have to physically track me down to see the outlook. I'll be here all day, though, miming away to anyone who passes.
Would you like to forecast the Londonist weather? I’ll be away for the start of next week, so we’ll need accurate and in-no-way-silly forecasts for London on Monday and Tuesday. Fancy having a go? Rather than typing out some words, you should draw, paint, or photograph your forecast (or perhaps craft it from leftover vegetables or Lego bricks) and send it to hello@londonist.com (subject line: ‘Attlee’s minion’).