Happy Birthday (Thai: Happy Birthday – วันเกิดของนาย วันตายของฉัน; Happy Birthday – Wan Koet Khong Nai Wan Tai Khong Chan) is a 2018 Thai television series starring Puttichai Kasetsin (Push), Lapassalan Jiravechsoontornkul (Mild) and Purim Rattanaruangwattana (Pluem).

Directed by Kanittha Kwunyoo and produced by GMMTV together with Nar-ra-tor, the series was one of the ten television series for 2018 showcased by GMMTV in their "Series X" event on 1 February 2018.

[1][2] It premiered on GMM 25 and LINE TV on 7 October 2018, airing on Sundays at 20:30 ICT and 22:30 ICT, respectively.

The series concluded on 30 December 2018.

[3][4] Below are the cast of the series:[5][6]