Anachronisms: In the "1977" segment, the beer can has a modern-day pop-top.
Anachronisms: In the "1984" section, the song "Oh Sheila", by Ready for the World, is played on the stereo; this song came out in late 1985.
Continuity: When Alan's parents arrive, the peephole under the 5 on his front door disappears and reappears between shots.
Continuity: Alan's dirt-stained jogging pants get cleaner between shots.
Anachronisms: In the park jogging scene set in 1977 Beverly is running in spandex and leggings. Leggings were not popularized and mainstreamed until Flash Dance created the trend in the early 1980s.