Withdrawal period with “W” on record According to Thammasat University’s announcement in response to the heavy rainfall and flooding situation in Thailand in 2026, the University has extended the deadline for course withdrawal with a “W” recorded
(via the REG TU system). The new deadline for course withdrawal (W) is October 26, 2026. August 19 – October 26, 2026 (from 9.00 AM of August 19 to 10.30 PM of October 26)