Happy Old Year (Thai title: ฮาวทูทิ้ง ทิ้งอย่างไร..ไม่ให้เหลือเธอ) is a 2019 Thai romantic drama film written and directed by Nawapol Thamrongrattanarit. The film had premiered in the "Voices Main Programme" section at the 49th International Film Festival Rotterdam. It was selected as the Thai entry for the Best International Feature Film at the 93rd Academy Awards, but it was not nominated.

A woman named Jean (Chutimon Chuengcharoensukying) returns home to Bangkok after spending three years in Sweden, and begins to de-clutter her family's house by throwing away anything that has been lying around unused. However, she faces a great challenge when she comes across some items that belonged to her ex-boyfriend named Aim, (Sunny Suwanmethanont). Memories of their past came to Jean and Aim as they try to rekindle their friendship despite breaking up as a result of Jean's lifelong plans to be an interior designer.