Seizr watches the Minecraft nickname you want and claims it the instant it frees up — synced to real time, so you never have to sit and watch the clock.
Your clock is synced against an NTP server, so Seizr fires at the true drop time — not your machine's drift.
At the drop, a wave of concurrent requests fires at once and stops the instant one lands the nickname.
Sign in once with Microsoft — no password stored. Seizr only ever acts on your own Minecraft profile.