Claudette the scene when vacuuming in the bedroom of Ricardo, have can see that the clock radio exchange 7:13 to 7:14. But can see that the alarm clock back to 7:13.
the license plate on Ricardo's Lada is from the 2010's it starts with 3 letters, in 1987 license plate were 3 numbers-1 letter-3 numbers.
When Ricardo is explaining that he received Kylie Minogue's cassette as the selection of the month from Columbia House. Kylie's album came out in 1988. The movie takes place in 1987.
In scene after Ricardo is arguing with Marie-Josée in the glove box in a car have see a candy box with the label nutrition facts dating from 2000.