The 4^th IndoMS International Conference on Mathematics and Its Applications (IICMA) 2019 will be held at Tanjungpura University, Pontianak, Indonesia, on September 23−25, 2019.

Pontianak, a city in the Borneo Island. It is a city that is passed by the equator. September 23^rd is the date when the sun passes the equator line. It is a special event that is celebrated every year by the people of Pontianak. We hope this will attract the participants not only to attend the conference but also to experience natural phenomenon that occurs twice a year at the equator monument, a prominent landmark in Pontianak. On that date people will experience to stand under the sun in midday without any shadow.