Events · Update event
Idyll Ecological Investigation
A recurring field research event in three windows between 16 September and 22 October 2026. The calendar lists the dates only.
Updated
- Start
- 16 September 2026
- End
- 22 October 2026
- Duration
- 3 windows · 19 days
- Windows
- 3
- Featured Aniimo
- None listed
What is Idyll Ecological Investigation?
Idyll Ecological Investigation appears three times on the launch calendar: 16 to 20 September, 2 to 8 October and 16 to 22 October 2026. The opening run is five days, the two later runs are seven days each, and they line up exactly with the second and third windows of Who’s That Aniimo?.
The official calendar lists only the dates. Nothing on aniimo.com describes the investigation itself, and the closed beta calendar reproduced in the Welcome to Idyll notice shows the same name with no description attached.
That leaves the schedule as the whole published picture. We will add the official description here when a notice publishes it.
Dates and windows
| Window | Dates | Days | Featured Aniimo | Status |
|---|---|---|---|---|
| Window 1 | 16 September 2026 to 20 September 2026 | 5 | TBD | Starts tomorrow |
| Window 2 | 2 October 2026 to 8 October 2026 | 7 | TBD | Starts in 17 days |
| Window 3 | 16 October 2026 to 22 October 2026 | 7 | TBD | Starts in 31 days |
Dates are the UTC+8 calendar days the official calendar publishes. The source gives no time of day, so treat the last date as the whole of that day in UTC+8 and do not leave a reward to the last hour of your own.
Rewards
- Rewards are not published yet.
Tips
The first window is the short one: five days from launch, closing 20 September 2026. The two later runs give you a full week each.
Windows two and three overlap Who’s That Aniimo? day for day, so plan one session that covers both rather than two.
22 October 2026 is the end of the last published window, with no fourth run on the calendar.
Other events running at the same time
Calendar →
Starts tomorrowNew player eventPrismana Promise: Choose Your Prismana AniimoFrom 16 Sept · UTC+8
Starts tomorrowNew player eventSet Out, Pathfinder!From 16 Sept · UTC+8
Starts tomorrowUpdate eventJourney Handbook16 Sept–28 Oct · UTC+8
Starts tomorrowUpdate eventWho’s That Aniimo?16 Sept–24 Sept · UTC+8
Starts in 10 daysUpdate eventGlamour Star25 Sept–1 Oct · UTC+8
Starts in 10 daysUpdate eventAniimo Discovery: Dazmand25 Sept–8 Oct · UTC+8
Starts in 16 daysUpdate eventJourney Moments1 Oct–28 Oct · UTC+8
Starts in 5 daysUpdate eventTracing the Trail20 Sept–9 Dec · UTC+8
Starts tomorrowUpdate eventLegendary Journey: Trail of Butterfly Shadows16 Sept–25 Sept · UTC+8
Starts in 10 daysUpdate eventLegendary Journey: Walking with Irisalis & Gift of Blessing25 Sept–9 Dec · UTC+8
Starts in 3 daysVein AbundanceVein Abundance18 Sept–20 Sept · UTC+8
Starts in 3 daysEggcelerationEggceleration18 Sept–20 Sept · UTC+8
Idyll Ecological Investigation FAQ
When does Idyll Ecological Investigation start and end?
Three windows on the official calendar: 16 to 20 September, 2 to 8 October and 16 to 22 October 2026, in UTC+8 calendar days.
Is Idyll Ecological Investigation still available?
It runs in windows. Compare today’s date with the three windows above; the last published window closes on 22 October 2026.
What do you do in the investigation?
The official calendar lists only the dates; the tasks are not published yet.
What are the rewards?
Rewards for Idyll Ecological Investigation are not published yet. The official calendar shows the three windows only, and no notice lists what the investigation pays out.
Is it the same event as Aniimo Discovery?
No. They are separate bars on the official calendar with separate windows, and Aniimo Discovery is the one with a published description.
Does it clash with anything else?
The second and third windows share their dates with Who’s That Aniimo?, and the third also overlaps two Eggceleration weekends.
Every date on this page is the UTC+8 calendar day the official source publishes, re-checked on 14 September 2026. Rewards the game has not announced are written as such rather than estimated. Sources: Aniimo official event calendar, Official notice: Welcome to Idyll. Compiled by Lorenzo Bruno (Yieng), about this site. Game assets © Pawprint Interactive Entertainment Pte. Ltd. This is an unofficial fan resource.