I'm guessing this documents an experience of being left on read during a time of need. The tattoo (if it's real) may be an attempt to punish the person they were reaching out to. All speculation, of course
It could also refer to the way this notification snitches on people who stay up late, so it's a joke about how they're a night owl. Not me though, it's definitely not 2:24am where I live currently.