Hello, this is the UDC 2025 Secretariat.

To provide a more stable service, maintenance on the official website will be conducted as follows:

ㅁ Date & Time: Wednesday, July 23, 2025, 19:00–19:30 (KST)

ㅁ Details: Server restart to maintain service quality

ㅁ Impact: Temporary service interruption of up to 5 minutes during the maintenance period

Please note that access to the website may be temporarily unstable during the maintenance period.

If you wish to purchase tickets, we kindly ask that you do so after the maintenance period.

Thank you.