Submit your events to ahwupdate at gmail dot com.
14-18: Loncon 3, the 72nd World Science Fiction Convention, will be held in London (where the Sidewise Awards will be announced on the 16th). Long-time contributors to The Update, Chris Nuttall and Daniel Bensen, will also be there.
14-31: New dates for Secret Cinema's Back To The Future Show in London UK.
22: Last day to fund the Outerlands: The Series Kickstarter by Chelsea Miller.
28-Sept 1: DragonCon at Atlanta, Georgia. Don't forget to check out the Alternate History Track or meet Harry Turtledove. Geez, now I want to go. Anyone want to buy me a plane ticket?
1: Deadline for submissions to the NESFA Science Fiction & Fantasy Short Story Contest and the membership rates for Sasquan will increase.
5-7: Historical Novel Society Conference in London. Full schedule here.
29: Last day to fund Hope Nicholson's Brok Windsor - Lost WWII Comic Book Returns! Kickstarter.
31: Submission period ends for The Temporal Element II by Martinus Publishing.
4: Longitude Punk'd at the Royal Observatory, Greenwich, UK.
26-27: Sideways in Time, an alternate history and counterfactuals conference, will be held at the University of Liverpool.
19-23: Sasquan, the 73rd World Science Fiction Convention, in Spokane, WA.