MapleStory: Idle RPG Summertime Surprise Coupon Gift

Nexon published the Summertime Surprise Coupon Gift on June 11, 2026. The code was COOLSUMMER and the official expiration was July 1, 2026 at 14:59 UTC, with regional times also listed in the source.

Because the deadline has passed, COOLSUMMER is historical and should not be described as a working MapleStory Idle code. A new coupon requires a new dated official notice.

The official notice lists the in-game path Menu → Settings → Other → Enter Coupon for Android. It also links a coupon page for both iOS and Android and explains how to copy the account UID.

The reward is delivered to the account mailbox after successful redemption. The source warns that a coupon can be used only once per account and that mailbox items have their own storage period.

Confirm the character and UID before redeeming. Nexon says it cannot restore or transfer rewards after a successfully used coupon, so an old social post or copied list is not enough evidence.

Use the official forum article linked below. Avoid pages that omit an expiration date, request an account password, or re-label an expired code as active.

A server landing page cannot answer whether a code is valid today. This article can, because the exact search phrase appears next to the publication date, expiration, platform instructions, and canonical source.

MPStorys keeps expired coupon articles indexed as history but labels their status plainly. That supports search discovery without misleading players who arrive after the redemption window.