Events in Castle Age used to be mostly Arenas, coming back usually once a year, and a few others like Dominion or Dungeon that happened only once or twice in several years (this doesn't include Promo packs, gifting events... basically anything that didn't add something to the actual gameplay).
Since May 2017, new events have been introduced which now come back rather often (every few months). Between May 2017 and September 2018, there has been more than one event each month on average.
Events Occurrences
| Start Date | End date | Event | Notes |
|---|---|---|---|
| 2025 | |||
| May 12, 2025 | May 18+1, 2025 | Dragon's Lair Treasure Hunt | Occ. 4 |
| May 1, 2025 | May 6, 2025 | Hella (Limited Artifact Monster) | Occ. 21 |
| Apr. 24, 2025 | Apr. 29, 2025 | Demon Chimera | Occ. 50 |
| Apr. 12, 2025 | June 6, 2025 | Eternal Beacon Fire | First occurrence |
| Apr. 11, 2025 | Apr. 18, 2025 | Meteorite Event | Occ. 37 |
| Apr. 1, 2025 | Apr. 6, 2025 | Hella (Limited Artifact Monster) | Occ. 20 |
| Mar. 25, 2025 | Mar. 30, 2025 | Demon Chimera | Occ. 49 |
| Mar. 12, 2025 | Mar. 19, 2025 | Other-Realm Adventure | Occ. 2 |
| Mar. 1, 2025 | Mar. 6, 2025 | Hella (Limited Artifact Monster) | Occ. 19 |
| Feb. 21, 2025 | Feb. 26, 2025 | Demon Chimera | Occ. 48 |
| Feb. 21, 2025 | Feb. 26, 2025 | Magic Abyss (Snow Carnival reskin) | Occ. 2 |
| Feb. 11, 2025 | Feb. 16, 2025 | Treasure Island Event | Occ. 33 |
| Feb. 1, 2025 | Feb. 6, 2025 | Hella (Limited Artifact Monster) | Occ. 18 |
| Jan. 24, 2025 | Jan. 29, 2025 | Demon Chimera | Occ. 47 |
| Jan. 10, 2025 | Jan. 15, 2025 | Fairy Forest - Pet Event | Occ. 9 |
| Jan. 2, 2025 | Jan. 8, 2025 | New Year Seven Days Celebration | First occurrence |
| Jan. 2, 2025 | Jan. 7, 2025 | Hella (Limited Artifact Monster) - Updated | Occ. 17 |
| 2024 | |||
| Dec. 26, 2024 | Dec. 31, 2024 | Demon Chimera | Occ. 46 |
| Dec. 21, 2024 | Dec. 30, 2024 | Christmas Presents Hunt | First occurrence |
| Dec. 21, 2024 | Dec. 27, 2024 | Santa Claus Chest (Limited) | First occurrence |
| Dec. 8, 2024 | Dec. 18, 2024 | Arena XVIII - Craftsman | Occ. 17 |
| Dec. 1, 2024 | Dec. 4, 2024 | Hella (Limited Artifact Monster) | Occ. 16 |
| Nov. 25, 2024 | Nov. 30, 2024 | Demon Chimera | Occ. 45 |
| Nov. 14, 2024 | Nov. 21, 2024 | Meteorite Event | Occ. 36 |
| Nov. 6, 2025 | Nov. 9, 2025 | Hella (Limited Artifact Monster) | Occ. 15 |
| Oct. 12, 2024 | Oct. 18, 2024 | Dragon's Lair Treasure Hunt | Occ. 3 |
| Oct. 3, 2024 | Oct. 6, 2024 | Hella (Limited Artifact Monster) | Occ. 14 |
| Sept. 25, 2024 | Sept. 30, 2024 | Demon Chimera | Occ. 44 |
| Sept. 25, 2024 | Sept. 30, 2024 | Fairy Forest - Pet Event | Occ. 8 |
| Sep. 12, 2024 | Sep. 18, 2024 | 15th Anniversary | Only occurrence |
| Sept. 5, 2024 | Sept. 8, 2024 | Hella (Limited Artifact Monster) | Occ. 13 |
| Aug. 25, 2024 | Aug. 30, 2024 | Demon Chimera | Occ. 43 |
| Aug. 12, 2024 | Aug. 18, 2024 | The Lost Dungeond | Occ. 5 |
| Aug. 5, 2024 | Aug. 8, 2024 | Hella (Limited Artifact Monster) | Occ. 12 |
| July 25, 2024 | July 30, 2024 | Demon Chimera | Occ. 42 |
| July 15, 2024 | July 20, 2024 | Other-Realm Adventure | First occurrence |
| July 1, 2024 | July 4, 2024 | Hella (Limited Artifact Monster) | Occ. 11 |
| June 24, 2024 | June 30, 2024 | Chaos & Order Chest (Limited) | First occurrence |
| June 24, 2024 | June 29, 2024 | Demon Chimera | Occ. 41 |
| Jun. 13, 2024 | Jun. 20, 2024 | Meteorite Event | Occ. 35 |
| June 3, 2024 | June 6, 2024 | Hella (Limited Artifact Monster) | Occ. 10 |
| May 24, 2024 | May 29, 2024 | Demon Chimera | Occ. 40 |
| May 24, 2024 | May 29, 2024 | Fairy Forest - Pet Event | Occ. 7 |
| May 13, 2024 | May 18, 2024 | Treasure Island Event | Occ. 32 |
| May 6, 2024 | May 9, 2024 | Hella (Limited Artifact Monster) | Occ. 9 |
| Apr. 24, 2024 | Apr. 29, 2024 | Demon Chimera | Occ. 39 |
| Apr. 11, 2024 | Apr. 18, 2024 | Meteorite Event | Occ. 34 |
| Apr. 2, 2024 | Apr. 5, 2024 | Hella (Limited Artifact Monster) | Occ. 8 |
| Mar. 25, 2024 | Mar. 30, 2024 | Demon Chimera | Occ. 38 |
| Mar. 14, 2024 | Mar. 20, 2024 | Dragon's Lair Treasure Hunt | Occ. 2 |
| Mar. 4, 2024 | Mar. 7, 2024 | Hella (Limited Artifact Monster) | Occ. 7 |
| Feb. 23, 2024 | Feb. 28, 2024 | Demon Chimera | Occ. 37 |
| Feb. 23, 2024 | Feb. 28, 2024 | Fairy Forest - Pet Event | Occ. 6 |
| Feb. 13, 2024 | Feb. 18, 2024 | Treasure Island Event | Occ. 31 |
| Feb. 4, 2024 | Feb. 7, 2024 | Hella (Limited Artifact Monster) | Occ. 6 |
| Jan. 26, 2024 | Jan. 31, 2024 | Demon Chimera | Occ. 36 |
| Jan. 23, 2024 | Feb. 1, 2024 | Pets Battle | First Occurrence |
| Jan. 11, 2024 | Jan. 18, 2024 | Meteorite Event | Occ. 33 |
| Jan. 2, 2024 | Jan. 5, 2024 | Hella (Limited Artifact Monster) | Occ. 5 |
| 2023 | |||
| Dec. 26, 2023 | Dec. 31, 2023 | Demon Chimera | Occ. 35 |
| Dec. 25, 2023 | Dec. 29, 2023 | Snow Carnival | Only Occurrence |
| Dec. 11, 2023 | Dec. 21, 2023 | Arena XVII - Valiant | Occ. 17 |
| Dec. 4, 2023 | Dec. 7, 2023 | Hella (Limited Artifact Monster) | Occ. 4 |
| Nov. 25, 2023 | Nov. 30, 2023 | Demon Chimera | Occ. 34 |
| Nov. 25, 2023 | Nov. 30, 2023 | Fairy Forest - Pet Event | Occ. 5 |
| Nov. 15, 2023 | Nov. 21, 2023 | Dragon's Lair Treasure Hunt | First occurrence |
| Nov. 6, 2023 | Nov. 9, 2023 | Hella (Limited Artifact Monster) | Occ. 3 |
| Oct. 23, 2023 | Oct. 27, 2023 | Demon Chimera | Occ. 33 |
| Oct. 11, 2023 | Oct. 18, 2023 | Meteorite Event | Occ. 32 |
| Oct. 2, 2023 | Oct. 5, 2023 | Hella (Limited Artifact Monster) | Occ. 2 |
| Sep. 26, 2023 | Sep. 30, 2023 | Demon Chimera | Occ. 32 |
| Sept. 13, 2023 | Sept. 19, 2023 | 14th Anniversary | Only occurrence |
| Sept. 4, 2023 | Sept. 7, 2023 | Hella (Limited Artifact Monster) | First occurrence |
| Aug. 26, 2023 | Aug. 31, 2023 | Demon Chimera | Occ. 31 |
| Aug. 23, 2023 | Aug. 28, 2023 | Fairy Forest - Pet Event | Occ. 4 |
| Aug. 11, 2023 | Aug. 16, 2023 | Treasure Island Event | Occ. 30 |
| July 24, 2023 | July 29, 2023 | Demon Chimera | Occ. 30 |
| July 11, 2023 | July 17, 2023 | The Lost Dungeon | Occ. 4 |
| June 24, 2023 | June 29, 2023 | Demon Chimera | Occ. 29 |
| June 23, 2023 | June 27, 2023 | Míchaël Chest (Limited) | Occ. 2 |
| June 12, 2023 | June 18, 2023 | Mobilization for War | First occurrence |
| May 25, 2023 | May 30, 2023 | Demon Chimera | Occ. 28 |
| May 24, 2023 | May 29, 2023 | Fairy Forest - Pet Event | Occ. 3 |
| May. 12, 2023 | May. 19, 2023 | Meteorite Event | Occ. 31 |
| Apr. 24, 2023 | Apr. 29, 2023 | Demon Chimera | Occ. 27 |
| Apr. 8, 2023 | Apr. 13, 2023 | Treasure Island Event | Occ. 29 |
| Mar. 26, 2023 | Mar. 31, 2023 | Demon Chimera | Occ. 26 |
| Mar. 13, 2023 | Mar. 20, 2023 | Meteorite Event | Occ. 30 |
| Feb. 23, 2023 | Feb. 28, 2023 | Demon Chimera | Occ. 25 |
| Feb. 22, 2023 | Feb. 27, 2023 | Fairy Forest - Pet Event | Occ. 2 |
| Feb. 10, 2023 | Feb. 15, 2023 | Treasure Island Event | Occ. 28 |
| Jan. 22, 2023 | Jan. 27, 2023 | Demon Chimera | Occ. 24 |
| Jan. 11, 2023 | Jan. 18, 2023 | Meteorite Event | Occ. 29 |
| 2022 | |||
| Dec. 24, 2022 | Dec. 29, 2022 | Demon Chimera | Occ. 23 |
| Dec. 8, 2022 | Dec. 18, 2022 | Arena XVI - Hades | Occ. 16 |
| Nov. 24, 2022 | Nov. 29, 2022 | Demon Chimera | Occ. 22 |
| Nov. 24, 2022 | Nov. 28, 2022 | Fairy Forest - Pet Event | First occurrence |
| Nov. 14, 2022 | Nov. 19, 2022 | Treasure Island Event | Occ. 27 |
| Oct. 22, 2022 | Oct. 27, 2022 | Demon Chimera | Occ. 21 |
| Oct. 11, 2022 | Oct. 18, 2022 | Meteorite Event | Occ. 28 |
| Sept. 27, 2022 | Oct. 2, 2022 | Demon Chimera | Occ. 20 |
| Sep. 14, 2022 | Sep. 20, 2022 | 13th Anniversary | Only occurrence |
| Aug. 23, 2022 | Aug. 28, 2022 | Demon Chimera | Occ. 19 |
| Aug. 11, 2022 | Aug. 17, 2022 | The Lost Dungeon | Occ. 3 |
| July 23, 2022 | July 28, 2022 | Demon Chimera | Occ. 18 |
| July 12, 2022 | July 19, 2022 | Meteorite Event | Occ. 27 |
| June 25, 2022 | June 30, 2022 | Demon Chimera | Occ. 17 |
| June 10, 2022 | June 15, 2022 | Treasure Island Event | Occ. 26 |
| May 27, 2022 | May 31, 2022 | Míchaël Chest (Limited) | Only occurrence |
| May 9, 2022 | May 16, 2022 | Meteorite Event | Occ. 26 |
| Apr. 25, 2022 | Apr. 30, 2022 | Demon Chimera | Occ. 16 |
| Apr. 11, 2022 | Apr. 16, 2022 | Treasure Island Event | Occ. 25 |
| Mar. 8, 2022 | Mar. 15, 2022 | Meteorite Event | Occ. 25 |
| Feb. 28, 2022 | Mar. 5, 2022 | Demon Chimera | Occ. 15 |
| Feb. 10, 2022 | Feb. 15, 2022 | Treasure Island Event | Occ. 24 |
| Jan. 11, 2022 | Jan. 18, 2022 | Meteorite Event | Occ. 24 |
| 2021 | |||
| Dec. 23, 2021 | Dec. 29, 2021 | Warm Winter Gift House | Only occurrence |
| Dec. 7, 2021 | Dec. 17, 2021 | Arena XV - Secrets | Occ. 15 |
| Nov. 26, 2021 | Nov. 30, 2021 | Hera Chest (Limited) | First occurrence |
| Nov. 8, 2021 | Nov. 13, 2021 | Treasure Island Event | Occ. 23 |
| Oct. 22, 2021 | Oct. 27, 2021 | Demon Chimera | Occ. 14 |
| Oct. 11, 2021 | Oct. 18, 2021 | Meteorite Event | Occ. 23 |
| Sep. 15, 2021 | Sep. 21, 2021 | 12th Anniversary | Only occurrence |
| Aug. 23, 2021 | Aug. 28, 2021 | Demon Chimera | Occ. 13 |
| Aug. 10, 2021 | Aug. 15, 2021 | Treasure Island Event | Occ.22 |
| July 12, 2021 | July 18, 2021 | The Lost Dungeon | Occ. 2 |
| June 24, 2021 | June 29, 2021 | Demon Chimera | Occ. 12 |
| June 10, 2021 | June 17, 2021 | Meteorite Event | Occ. 22 |
| May 21, 2021 | May 26, 2021 | Demon Chimera | Occ. 11 |
| May 12, 2021 | May 17, 2021 | Treasure Island Event | Occ. 21 |
| Apr. 23, 2021 | Apr. 28, 2021 | Demon Chimera | Occ. 10 |
| Apr. 12, 2021 | Apr. 19, 2021 | Meteorite Event | Occ. 21 |
| Mar. 12, 2021 | Mar. 17, 2021 | Treasure Island Event | Occ. 20 |
| Feb. 23, 2021 | Feb. 28, 2021 | Demon Chimera | Occ. 9 |
| Feb. 10, 2021 | Feb. 17, 2021 | Valentine's Day event | Meteorite Occ. 20 |
| Jan. 31, 2021 | Feb. 4, 2021 | Kung Fu Chest (Limited) | Occ. 3 |
| Jan. 20, 2021 | Jan. 25, 2021 | Demon Chimera | Occ. 8 |
| Jan. 11, 2021 | Jan. 16, 2021 | Treasure Island Event | Occ. 19 |
| 2020 | |||
| Dec. 21, 2020 | Dec. 31, 2020 | Arena XIV - Justice | Occ. 14 |
| Dec. 2, 2020 | Dec. 7, 2020 | Kung Fu Chest (Limited) | Occ. 2 |
| Nov. 24, 2020 | Nov. 29, 2020 | Demon Chimera | Occ. 7 |
| Nov. 11, 2020 | Nov. 17, 2020 | Happy Thanksgiving Day event | Meteorite Occ. 19 |
| Oct. 23, 2020 | Oct. 28, 2020 | Demon Chimera | Occ. 6 |
| Oct. 13, 2020 | Oct. 18, 2020 | Treasure Island Event | Occ. 18 |
| Sept. 14, 2020 | Sept. 20, 2020 | 11th Anniversary incl. Anniversary Celebration |
Only occurrence Meteorite Occ. 18 |
| Aug. 24, 2020 | Aug. 29, 2020 | Demon Chimera | Occ. 5 |
| Aug. 12, 2020 | Aug. 18, 2020 | The Lost Dungeon 2020 | First occurrence |
| July 24, 2020 | July 29, 2020 | Demon Chimera | Occ. 4 |
| July 15, 2020 | July 21, 2020 | Meteorite Event | Occ. 17 |
| June 24, 2020 | June 29, 2020 | Caverns of Time Event | Occ. 10 |
| June 16, 2020 | June 21, 2020 | Demon Chimera | Occ. 3 |
| June 4, 2020 | June 9, 2020 | Treasure Island Event | Occ. 17 |
| May 22, 2020 | May 27, 2020 | Demon Chimera | Occ. 2 |
| May 13, 2020 | May 19, 2020 | Meteorite Event | Occ. 16 |
| Apr. 29, 2020 | May 4, 2020 | Kung Fu Chest (Limited) | First occurrence |
| Apr. 17, 2020 | Apr. 22, 2020 | Demon Chimera | First occurrence |
| Apr. 7, 2020 | Apr. 12, 2020 | Treasure Island Event | Occ. 16 |
| Mar. 12, 2020 | Mar. 18, 2020 | St. Patrick's Day Event | Meteorite Occ. 15 |
| Feb. 19, 2020 | Feb. 24, 2020 | Caverns of Time Event | Occ. 9 |
| Feb. 7, 2020 | Feb. 12, 2020 | Treasure Island Event | Occ. 15 |
| Jan. 13, 2020 | Jan. 21, 2020 | Meteorite Event | Occ. 14 |
| 2019 | |||
| Dec. 28, 2019 | Jan. 2, 2020 | Nightmare Chest (Limited) | Occ. 5 |
| Dec. 10, 2019 | Dec. 20, 2019 | Arena XIII - Thunder | Occ. 13 |
| Nov. 12, 2019 | Nov. 19, 2019 | Meteorite Event | Occ. 13 |
| Oct. 27, 2019 | Nov. 1, 2019 | Caverns of Time Event (for Halloween) |
Occ. 8 |
| Oct. 11, 2019 | Oct. 16, 2019 | Treasure Island Event | Occ. 14 |
| Sept. 16, 2019 | Sept. 22, 2019 | 10th Anniversary Festival | Only occurrence |
| Sept. 6, 2019 | Sept. 11, 2019 | Caverns of Time Event | Occ. 7 |
| Aug. 13, 2019 | Aug. 20, 2019 | Meteorite Event | Occ. 12 |
| July 27, 2019 | Aug. 2, 2019 | Treasure Island Event | Occ. 13 |
| July 11, 2019 | July 16, 2019 | Caverns of Time Event | Occ. 6 |
| June 11, 2019 | June 18, 2019 | Meteorite Event | Occ. 11 |
| May 27, 2019 | June 2, 2019 | Treasure Island Event | Occ. 12 |
| May 10, 2019 | May 15, 2019 | Caverns of Time Event | Occ. 5 |
| Apr. 15, 2019 | Apr. 21, 2019 | Happy Easter Event | Meteorite Occ. 10 |
| Apr. 4, 2019 | Apr. 9, 2019 | Nightmare Chest (Limited) | Occ. 4 |
| Mar. 16, 2019 | Mar. 21, 2019 | Treasure Island Event | Occ. 11 |
| Feb. 24, 2019 | Mar. 1, 2019 | Nightmare Chest (Limited) | Occ. 3 |
| Feb.14, 2019 | Feb. 20, 2019 | Caverns of Time Event | Occ. 4 |
| Jan. 28, 2019 | Feb. 2, 2019 | Treasure Island Event | Occ. 10 |
| Jan. 8, 2019 | Jan 15, 2019 | Meteorite Event | Occ. 9 |
| 2018 | |||
| Dec. 26, 2018 | Jan. 1, 2019 | Nightmare Chest (Limited) | Occ. 2 |
| Dec. 17, 2018 | Dec. 27, 2018 | Arena XII - KungFu | Occ. 12 |
| Nov. 23, 2018 | Nov. 28, 2018 | Treasure Island Event | Occ. 9 |
| Oct. 30, 2018 | Nov. 5, 2018 | Happy Halloween Event | Meteorite Occ. 8 |
| Oct. 16, 2018 | Oct. 22, 2018 | Caverns of Time Event | Occ. 3 |
| Sept. 28, 2018 | Oct. 5, 2018 | Nightmare Chest (Limited) | First occurrence |
| Sept. 12, 2018 | Sept. 18, 2018 | Meteorite Event | Occ. 7 |
| Aug. 29, 2018 | Sept. 4, 2018 | Treasure Island Event | Occ. 8 |
| Aug. 13, 2018 | Aug. 18, 2018 | Caverns of Time Event | Occ. 2 |
| July 30, 2018 | Aug. 4?, 2018 | Treasure Island Event | Occ. 7 |
| July 16, 2018? | July 24, 2018 | Meteorite Event | Occ. 6 |
| June 19, 2018 | June 25, 2018 | Caverns of Time Event | First occurrence |
| May 28?, 2018 | June 4?, 2018 | Treasure Island Event | Occ. 6 |
| May 14, 2018 | May 21, 2018 | DeathMatch | Only occurrence |
| Apr. 4, 2018 | Apr. 11, 2018 | Meteorite Event | Occ. 5 |
| Mar. 7, 2018 | Mar. 13, 2018 | Treasure Island Event | Occ. 5 |
| Feb. 7, 2018 | Feb. 16, 2018 | FLIPPED Event | First occurrence Meteorite Occ. 4 |
| Jan. 3, 2018 | Jan. 9?, 2018 | Treasure Island Event | Occ. 4 |
| 2017 | |||
| Dec. 1, 2017 | Dec 15, 2017 | Arena XI - Frost | Occ. 11 |
| Nov. 6, 2017 | Nov. 13, 2017 | Meteorite Event | Occ. 3 |
| Oct. 16, 2017 | Oct. 22, 2017 | Treasure Island Event | Occ. 3 |
| Aug. 13, 2017 | Aug. 21, 2017 | Meteorite Event | Occ. 2 |
| July 23, 2017 | July 30, 2017 | Treasure Island Event | Occ. 2 |
| June 20, 2017 | June 27, 2017 | Treasure Island Event | First occurrence |
| May 1, 2017 | May 12, 2017 | Meteorite Event | First occurrence |
| Mar. 1, 2017 | Mar. 8, 2017 | Dominion | Occ. 4 |
| 2016 | |||
| Nov. 30, 2016 | Dec. 14, 2016 | Arena X - Judgement | Occ. 10 |
| Sept. 19, 2016 | Sept. 27, 2016 | Dominion | Occ. 3 |
| July 27, 2016 | Aug. 3, 2016 | Dominion | Occ. 2 |
| 2015 | |||
| Jan. 8, 2015 | Jan. 29, 2015 | Arena IX - Nightmare | Occ. 9 |
| 2014 | |||
| Nov. 24, 2014 (first 3) Dec. 4, 2014 (Agony) |
Dec. 15, 2014 |
Succubus of Desire |
Only occurrence |
| July 2, 2014 July 18, 2014 Aug. 6, 2014 |
July 16, 2014 Aug. 1, 2014 Aug. 20, 2014 |
Only occurrence | |
| 2013 | |||
| Dec. 5, 2013 | Jan. 2, 2014 | Arena VIII - Reckoning | Occ. 8 |
| Sept. 5, 2013 | Sept. 25, 2013 | Dungeon | First occurrence |
| July 25, 2013 | Aug. 1, 2013 | Dominion | First occurrence |
| July 19, 2013 | July 24, 2013 | Dominion | Beta |
| June 5, 2013 | June 26, 2013 | Arena VII - Coldsteel | Occ. 7 |
| 2012 | |||
| Dec. 5, 2012 | Jan. 3, 2013 | Arena VI - Battlelust | Occ. 6 |
| 2011 | |||
| Oct. 19, 2011 | Nov. 9, 2011 | Arena V - Perdition | Occ. 5 |
| Aug. 8, 2011 | Aug. 16, 2011 | Call of Heroes | Only Occurrence |
| July 28, 2011 | Aug. 18, 2011 | Arena IV - Wrath | Occ. 4 |
| Jan. 5, 2011 | Jan. 26, 2011 | Arena III - Annihilator | Occ. 3 |
| 2010 | |||
| July 28, 2010 | mid-Aug., 2010 | Arena II - Vanguard | Occ. 2 |
| Mar. 24, 2010 | Apr. 12, 2010 | Arena I - Legends | First occurrence |
| 2009 | |||
| GAME CREATION | |||
Notes
- "Occ." = Occurrence
- For a full chronology of the game, check this article: Castle Age Chronology
- For a similar article about Promotions, refer to this article: Promotions rotation
- About Dungeon: it came back for some time as a "lasting" feature on Dec. 16, 2013. It was only available for iOS players or new players on FB. It disappeared from the game during 2014 (June?). It was seemingly abandoned.
- Not all events are present on this list. Stuff like gifting "events" & limited alchemies, promo packs and other promotional offers are not.
- Special Treasure Chests (such as the Nightmare Chest) appearances are on this list as they seem to usually "delay" the appearance of other events (Meteorite, Treasure Island, Caverns of Time). However it is definitely not an event (strictly speaking).
- Certain features such as Colosseum and the World Monster are considered to be seasonal features rather than events and are not on this list.