Why server time matters for international fans
- Korean ticket sales open exactly on the site's clock in KST. If your device clock is a few seconds off, you may refresh too early or enter late.
- Most big K-pop shows sell to international fans through a separate global booking page (often in English). Check the notice for which page, which time and which fan-club pre-sale applies to you.
- Global pages may require a passport name that matches your ID at pick-up, and payment by international card or PayPal. Prepare these before the opening.
- Queues (waiting rooms) are common. Once in the queue, do not refresh or close the window — you may lose your place.
How is it measured? (limits of accuracy)
- Web servers send their clock in the
Dateheader of every response. Browsers cannot read this header from other sites (CORS), so our server (a Cloudflare Worker) sends a light request (HEAD, or a 1-byte GET) to the site's front page and reads it for you. - The Date header has 1-second resolution, so a single reading can be up to 1 second off. We take up to 10 readings, timed to land right when the server's second ticks over, and halve the possible range each time, accounting for the round-trip time.
- The hundredths of a second on screen are the running estimate; the real accuracy is shown separately as ±ms — usually a few tens of milliseconds, more on unstable networks.
- The clock we read belongs to the web server (or CDN) serving the front page, which may differ from the server handling bookings and queues. Most servers are synced to internet time, so the difference is small, but the exact moment the button opens is decided by the site's system.
- Results for the same site are reused for 2 seconds to avoid burdening it, so a precise measurement takes about 15–20 seconds.
Tips before tickets open
- Log in 10–20 minutes before ticket sales open. If your session expires and you have to log in again, you lose time.
- Register and check your payment method (international card, PayPal where supported), address and identity verification in advance.
- Rather than refreshing dozens of times right before ticket sales open, enter once, right after the opening time on the server clock. Excessive refreshing can get you temporarily blocked or pushed back in the queue.
- Many sites show a waiting-room queue when traffic spikes. Queues usually go in order of arrival, so refreshing or closing the window may lose your place.
- Some sites limit or block using several windows or devices at once; check the terms.
- Use a stable Wi-Fi or wired connection and pause large downloads just before the opening.
FAQ
Why check the server time?
Ticket, limited-edition and train sales open on the site's server clock. If your device clock is a few seconds off you may refresh too early or enter late, so right before the opening use the site's server clock as your reference.
Which sites are supported?
Interpark Ticket, Melon Ticket, YES24 Ticket, Ticketlink, Weverse Shop, Korail, SRT, CGV and more Korean sites. Only a fixed list of sites can be checked, to avoid abuse and load on those sites.
How accurate is it?
We read the Date header (1-second resolution) several times and narrow down the moment the second changes, usually to within a few tens of milliseconds. The actual accuracy is shown as ±ms on each site's page.
What time zone is shown?
Korea Standard Time (KST, UTC+9), which is what Korean ticketing notices use. Use the converter on this page to see the same moment in your own time zone.