F4 Thailand: Boys Over Flowers takes place in three different real-world years. It begins in 2021, covering about half of the year. The final two episodes are set in August 2022 with an epilogue set during 2024.
F4 Thailand takes place primarily in 2021, starting around late April and going to late July in the fourteenth episode. The final two episodes take place during August 2022. Finally, Gorya graduates in 2024 after missing a year of school.
Flashbacks from episodes three and four take place around when the F4 are aged five to six. The flashback from episode five is from when the F4 are eleven to twelve. Hana in this flashback is likely eight to nine.
Character ages[]
Parbdee revealed the astrological signs of the main five characters: Gorya (Virgo), Thyme (Gemini), Ren (Aries), Kavin (Sagittarius), and MJ (Pisces).[1]
GMMTV later revealed their birthdays: Gorya (September 15), Thyme (June 12), Ren (March 22), Kavin (December 7), and MJ (February 28).[2]
Thyme celebrates his birthday in episode eight. Though his age is not explicitly stated, it can be assumed that he turned eighteen which would make his birth year 2003.
The following table is based mostly on guess work with the information given and none of the ages have been explicitly stated.
↑Though not explicitly stated, it is most likely that Thyme turns eighteen due to 2021 being his final year at Kocher. Therefore his birth year would be 2003.