Sixteen-year-old Colin Chee will go to school tomorrow night, taking with him his T-shirt and shorts to sleep in.
But it is not for an overnight study session at Catholic High School ahead of his O levels in three months' time.
Instead, he and his schoolmates will be cheering on either Germany or Argentina in Monday morning's World Cup final, which is being screened in the Bishan school's multi-purpose room.
Others showing the final include St Joseph's Institution, Singapore Sports School and Dunman High School.
Catholic High's principal Lee Hak Boon said the optional sleepover was set up after students suggested it.
"These students have sought their parents' consent and appreciate the care shown by the school," he said. "They also look forward to the experience of viewing the final with their peers."
Students will report to school by 9.30pm and sleep at 11pm. After the match, they will have breakfast and then report for flag-raising at 7.20am.
Colin said the sleepover will be a good break from studying.
"My parents don't mind because my preliminary examination results were quite okay."
He doubts that he and his classmates will get much sleep, however. "I may fall asleep halfway while singing the national anthem," he said with a laugh.
Serangoon Garden Secondary School, meanwhile, has pushed back its classes by more than three hours on Monday. School will start at 11am and end at 5pm.
This is "so that our students will have sufficient rest for the day's lessons and programmes", said principal Stephen Tay.
Likewise, several workplaces are adopting flexible working hours for their staff.
Mattress company Simmons and British bank Barclays are allowing their staff to report for work later on Monday, while local advertising agency Up Brandbuzz is giving its workers the morning off.
Its managing director Anand A. Vathiyar said: "The biggest sporting event in the world... should be given special treatment.
"The morning after will give fans of the winning team an opportunity to get over their hangover, and for the fans of the losing team ample time to get over the bluest of Monday blues."