The cover of the Omni, or Omnichron as it was called in the script, is engraved with the phrase "Time Waits For No Man."
When they canceled Voyagers!, there was a funny skit on the David Letterman show called "They Took My Show Away," where Dave helps a kid overcome his disappointment. The skit aired 09.05.1983.
No matter where Jeffrey and Phineas travel in time they always manage to find perfect fitting clothes from that era.