Movie took only 9 months to write, film, and edit. Researching (on time travel) took approximately 3 months.
There has been 3 different titles for this movie: "Welcome to Yesterday", "Almanac", and "Project Almanac".
In the scene where the characters are watching an airline crash on their laptop, the footage is actually of a real B-52 crash accident that killed four Air Force officers in 1994. Relatives of the officers complained about the crash appearing in the film, and producer Michael Bay apologized. The scene was supposedly removed, but it was still there when the movie aired on British TV in April 2018.
The plane crash video that they watch on the laptop is the same footage used in the movie Flight (2012) with Denzel Washington, but with further video editing.
The screenplay for this film was featured in the 2012 Blacklist; a list of the "most liked" unmade scripts of the year.
In a scene in Teenage Mutant Ninja Turtles (2014), you can see Project Almanac being advertised in the background. Both movies are produced by Michael Bay.
In one scene, one of the group is attempting to connect two power cables together in order to make the time travel machine work, but he states that they're not long enough and therefore don't reach. This is a possible nod to Back To The Future where Doc is trying to connect two power cables together but they don't reach because one is snagged on a tree branch.
One of the characters can be seen watching Bill & Ted's Excellent Adventure (1989) on a laptop. The film concerns two teenagers who utilize a time machine to complete a history project.
One of David's friends can be heard talking about the sci-fi/action film Timecop (1994). Both "Timecop" and "Project Almanac" involve the year 2004 as well as traveling exactly 10 years into the past. Coincidentally, 2004 is ten years in the future in "Timecop" since it was made in 1994 and in "Project Almanac" 2004 is ten years in the past since 2014 was the year it was filmed.
Sam Lerner plays Quinn Goldberg in this movie. He dates Erica Goldberg on the TV show The Goldbergs (2013).
In their first test run of time travel they send a red toy car. In Back to the Future Doc uses a red toy car to demonstrate how Marty will get back to the future. Could be a tribute.