'Stranger Things' fans noticed a heartbreaking detail about Will Byers' birthday in the new season

• Warning: Minor spoilers ahead for "Stranger Things" season four.
• In episode two of the new season, Mike arrives to visit Eleven and Will on March 22.

In season two of Netflix's "Stranger Things," Joyce Byers tells Will a story about his birthday, and mentions that it's March 22. But either co-creators Duffer Brothers forgot this detail, or the new season begins with an incredibly depressing birthday for Will, with not a single person remembering to celebrate his life.

The title card for the first episode, "The Hellfire Club," tells us that the date is March 21, 1986. In that episode we also learn that Mike is flying to California the very next day, March 22, to visit Eleven and Will.

But not a single character — not even Joyce — mentions that it's Will's birthday. In fact Will is the one who appears to have a gift for Mike (a rolled up tube that is likely the mysterious painting he's been working on). But Mike doesn't give Will an enthusiastic hug at the airport or seem happy to see his supposed best friend, sending Will into a saddened mood.

At the roller skating rink, Will is left to skate by himself. He later tells Mike about feeling left out and like Mike doesn't make an effort in their relationship, but Mike brushes this aside.

All of this happens on March 22 — the day that (according to the show's past episode) is Will birthday.

One TikTok compiling video clips of the episode was seen five million times in one day. The top comments, which were liked by over 100,000 people, are all about the sadness of Will's situation.

"BRO NOO no wonder he was so sad bro," one person wrote.

"THIRD WHEELING ON HIS BIRTHDAY??" another said. "I WOULD CRY."

Viewers seemed split on whether it was intentional. However, if it was intentional, it tops off a sad list of life events for the character. He grew up with an absent father and anxious mother, got lost and nearly died in an alternate dimension while being hunted by a supernatural monster, then got possessed by a second, scarier monster. Now he's in a new school with no friends, and his own family has possibly forgotten his birthday.

Throw in the fact that he's stuck with that bowl haircut (something actor Noah Schnapp told Insider he's asked the Duffers to change), and it's downright depressing.

In an interview with Schnapp last week, Insider asked about the isolation Will is experiencing in California.

"We're used to seeing him facing those supernatural forces and the antagonist against him is a monster or a dark thing in the Upside Down," Schnapp said. "But this season we see him in a new place with a new struggle — it's just him coping with his new environment in California and facing personal identity crisis a little bit and high school struggles."

He continued: "It was fun as an actor to just play this new side of Will. Not running away from the monster, but running away from real life problems that I think fans can really relate to and resonate with. I think it's important for 'Stranger Things' to tell those kinds of stories and show fans that they're not alone in their struggles, too."

"Stranger Things" season four, part one, is streaming on Netflix now.