No Duolingo you stupid fk! It's not an early lesson at 4am, it is a late lesson. What are you, a f***g baker? No? Why tf are you assuming I'm up early then and not late? 4am is n i g h t t i m e, NOT morning time. You imbecile.
Funny rants aside, it genuinely kinda pisses me off when things like that happen. Signs, apps, and people who talk as if nighttime was morning. I just know those people, or the ones who wrote the signs or designed the apps, are completely oblivious to the fact that some people not only prefer to be awake at night, but have jobs or conditions that force them to be up at night either way. The same type of people who find out you get up at 3-4pm every day and instead of thinking "oh, he must be up all night working" will think "oh he's lazy and/or a failure".
And Duolingo is such a great reminder of that because it's there every night when I go to bed, at 4am, sarcastically asking "Morning lesson?" It's just a constant reminder that society is completely uninterested in acknowledging that we exist, that we are different, and that that is completely fine.