Phrases

[jwatts1981]

where does the phrase junior friday come from Isee peole write on social media happpy junior friday when it only thursday has anyone ever heard that before

[Buenchico]

Going by some of your odd posts, I think you must move in very different online circles to most of us here ;-)

The Urban Dictionary agrees with your suggestion that 'junior Friday' is simply (weird) slang for Thursday:
https://www.urbandictionary.com/define.php?term=junior%20friday

[roopower]

Sounds like yet another americanism we could do without

[weecalf]

Could be Robinson’s friends son what do you think ?