The White Day 2026 event runs March 6–22, 2026 (23:59 UTC hard cutoff) — no extensions, no carryover. Maximum Locked Diamond haul is 1,100 from couple tiers or 988 via solo NPC submission, both counting fully toward limited banner pity. Every reward, including Magic Box Exchange Cards, dies at the deadline. Here's everything you need before the clock runs out.
Event Overview: Dates, Servers & First Steps
Active servers: Idol School, Shining Star, South East Asia Global (1001), Middle East (1002). Different server? This content won't appear.
Do this first: Redeem the gift code before March 12. Go to Profile → Gift Code → enter IT7BQGSC1V (case-sensitive) → Redeem. After March 12, it's gone. This contributes to your early Diamond stack before the limited banner opens March 13.
Mission Tracks: What Goes Where
Two separate tracks. Don't treat them as one system — they have different start dates and different submission requirements.
Main White Day Event (March 6–22): Daily missions, login streaks, idol interactions, PLOGs, gift-sending. Stack these with event tasks — community testing confirms it doubles your Diamond yield per session. Completing them separately wastes time.
F2P monthly Diamond income from dailies alone runs 90–150 Diamonds. Full monthly stack (dailies + logins + events + club + codes) reaches 300–600. White Day pushes that ceiling higher.
Login streak warning: Milestones peak at Day 7, 14, and 28 (30–60 Diamonds each). Missing one day resets your streak. A reset during March 6–22 costs you compounding rewards — protect it.
White Valentine Couple Event (March 12–22): This is where the big Locked Diamond numbers live. Submission process:
Post a PLOG or screenshot featuring your couple
Include your UID (7–10 digits, found at Profile → Personal Info)
Add a description
Submit to Discord 💖┊white-valentine OR the Steam event page
Both channels are valid. Judging determines your reward tier.
The Hidden Diamond Source Most Players Miss
The Achievement Gallery holds 50–200 unclaimed Diamonds for most active players — locked behind social, affection, and login milestones that unlock silently with no notification. The mistake is checking it once and moving on. Milestones trigger as you complete other event activities, so a gallery showing nothing on March 6 may have 3–4 claimable rewards by March 14. Check it every 3–4 days minimum.
Locked Diamonds: Every Unlock Condition
Locked Diamonds count fully toward limited banner pity but can't be used for non-gacha purchases (name changes cost 500 free Diamonds — Locked Diamonds won't cover that). For the limited SSR banner specifically, they're functionally identical to paid Diamonds.
The F2P math is decisive. NPC submission yields 888 + 100 = 988 Locked Diamonds, guaranteed, zero partner coordination. Lucky Award (top 3) yields only 500 — that's 388 fewer than the NPC route, and it requires competitive ranking with no guarantee. Unless you're actively competing for Best Couple, NPC submission is the correct play.
Maximum cap: 1,100 Locked Diamonds (Best Couple 1,000 + Participation 100). For everyone else, 988 is the realistic F2P ceiling from the couple event.
Why This Changes Your Pull Math
Hard pity on the limited banner: 4,480 Diamonds (28 pulls × 160 Diamonds). Soft pity activates around pull 20 (~3,200 Diamonds), boosting SSR rates through to the pull 28 guarantee.
The 50/50 mechanic applies at hard pity: 50% chance of the featured SSR, 50% non-featured. Losing the 50/50 guarantees the featured SSR on the next hard pity. Worst case: 8,960 Diamonds (56 pulls) for a guaranteed featured SSR.
Here's what most guides miss: those 988 Locked Diamonds from NPC submission aren't passive rewards sitting in your wallet. They represent ~6.2 pulls of pity progress (988 ÷ 160) already banked before you spend a single paid Diamond. Community estimates put prepared F2P players at pull 12–15 out of 28 when the banner opens March 13 — already past halfway to hard pity, through event participation alone.
Critical: Pity does NOT carry over after March 22, 23:59 UTC. Whatever you've built on the limited banner resets when it closes.
If you're considering topping up to close a pity gap before March 22, complete any recharge before March 18 — last-day server load and payment processing delays are real risks.
Full Reward Table & Priority Guide
Grab immediately:
NPC couple photo submission (988 Locked Diamonds, zero competition risk)
Gift code IT7BQGSC1V before March 12
Achievement Gallery audit (50–200 Diamonds already earned, just unclaimed)
Magic Box Exchange Cards — use before March 22, they vanish
Grab if you have a partner:
Best Couple competition (1,000 Locked Diamonds, but reaching top-3 requires ~5,376 Diamonds in gifting per week — significant investment)
Evaluate carefully:
Limited SSR banner. It's a support-type idol scaling with 2–3 skill upgrades across gifting, affection, and stage performance — genuinely useful. Pull if you're within 1,500 Diamonds of 4,480 pity or past pull 19 in soft pity. Starting from zero pity? Treat this as pity-building infrastructure, not a pull target.
Skip:
Standard banner pulls during this window. Standard and limited banners have separate pity pools. Pulling standard dilutes nothing toward the featured SSR — it's the most expensive mistake active players make during limited events.
Efficiency Strategies
F2P Optimal Daily Routine
Complete daily missions while doing event tasks — stack them, never separate
Check Achievement Gallery every 3–4 days
Protect login streak (Day 7/14/28 milestones)
Submit NPC couple photo the moment the Couple Event opens March 12
Redeem Magic Box Exchange Cards before March 22
The 70/30 reserve rule applies: spend no more than 70% of your Diamond stack on any single banner. White Day is one event in a longer content calendar.
Starting Late? The 3-Day Rush (March 20–22)
Still completable:
NPC couple photo submission → 988 Locked Diamonds (if Couple Event still open)
Achievement Gallery audit → up to 200 Diamonds
Remaining daily missions → partial stack
Magic Box Exchange Card redemption
Already missed:
Gift code IT7BQGSC1V (expired March 12)
Early Diamond stacking before the banner opened March 13
Full login streak milestones
Focus entirely on NPC submission and Achievement Gallery. Those two actions deliver close to 1,000+ Diamonds in under 30 minutes. Don't chase competitive couple ranking with 3 days left — the ~5,376 Diamonds per week gifting requirement makes it mathematically unreasonable.
Light Spender: Where Recharge Actually Matters
The First Recharge Bonus doubles your first top-up — once per account, permanently. Community consensus is unanimous: never use it on small packs (60 or 300 Diamonds). Save it for the 3,280+ Diamond tier where the doubling creates meaningful pity progress.
Within 1,500 Diamonds of the 4,480 threshold when the banner opens March 13? Closing that gap is defensible. Starting from scratch on pity? Worst-case cost is 8,960 Diamonds — treat this event as pity infrastructure, not a pull opportunity.
For players topping up before the deadline, Idol Party Diamonds top up during White Day 2026 is available through BitTopup. Recharge before March 18 to give payment processing adequate buffer.
FAQ
When does the event end? March 22, 2026 at 23:59 UTC. Applies to the main event, Couple Event, limited SSR banner, and all Magic Box Exchange Cards simultaneously.
What's the difference between Locked Diamonds and Free Diamonds? Locked Diamonds count toward limited banner pity but can't cover non-gacha purchases (name changes cost 500 free Diamonds). Free and paid Diamonds are unrestricted. For limited banner pulls, Locked Diamonds are functionally identical to paid Diamonds.
Do Locked Diamonds expire after March 22? The Diamonds themselves don't expire — they stay in your account. What expires is the source: couple event rewards and Magic Box Exchange Cards can't be claimed after March 22. Limited banner pity, however, resets completely at deadline with no carryover.
What happens to unused Magic Box Exchange Cards? They expire March 22, 23:59 UTC. No carryover. Use them before the deadline.
Is the limited SSR banner worth pulling on? Pull if you're within 1,500 Diamonds of hard pity (4,480) or past pull 19. The limited SSR is a support-type idol with strong utility across gifting, affection, and stage performance — useful, not just cosmetic. Zero pity? Build toward it rather than pulling blind.
Can I complete all missions starting late? Partially. NPC couple photo submission and Achievement Gallery audit are still viable in the final days. Gift code expired March 12. Full login streak milestones are gone. Late starters: focus exclusively on NPC submission and Achievement Gallery — highest Diamond yield for time invested.
Best use of Magic Box Exchange Cards? Redeem before March 22. They're tied to the event shop and disappear at deadline. There's no future use after the event closes.
The NPC submission route and Achievement Gallery audit together can deliver close to 1,200 Diamonds with minimal effort — positioning most F2P players meaningfully on limited banner pity before spending anything. Submit your NPC couple photo the moment the Couple Event opens March 12, audit your Achievement Gallery at least twice before March 22, and stay off the standard banner until the limited window closes.