When Does "Atypical" Season Two (2018) Take Place?
"Atypical" season two is a comedy television series showran by Robia Rashid that released September 7th, 2018. So when is "Atypical" season 2 set?
It takes place in the years:
We know this because it must take place merely hours or days after season one episode eight "The Silencing Properties of Snow" (2017), which takes place after 2015 AD. So it has to also be after 2015 AD.

2019 AD - 2020 AD
We know this because it must take place merely hours or days after season one episode eight "The Silencing Properties of Snow" (2017), which takes place after 2015 AD. So it has to also be after 2015 AD.
More specifically, during season two episode one "Juiced!" Casey Gardner specifically says, "I start school tomorrow!" The next day when Casey has her first day is seen in the next episode, season two episode two "Penguin Cam and Chill". American high schools start their year in early September. So it is presumably September of 2019 AD at the start of the season.
Later, during season two episode ten "Ernest Shackleton's Rules for Survival" Sam graduates high school and American high schools usually end their school years in May or June so it's summer of 2020 AD at the end of the season.
Additionally, there is a prologue to season two episode one "Juiced!" that includes Doug Gardner saying, "He's 4-years-old and 4-year-olds have tantrums." about Sam Gardner. During the main action of this season Sam is probably 19-years-old since he was 18-years-old during the season one, the previous season. So it's 2004 AD during the prologue.
19 - 4 = 15
and
2019 - 15 = 2004.
Furthermore, the prologue begins with a white on black time setting subtitle reading: "2004".

