The 1999 Calendar is a reward system for activities performed in Höllvania. It is unlocked after completing The Hex quest, using the Pom-2 in the Orbiter, Höllvania Central Mall, or Backroom.
Mechanics[]
Seasons[]
There are four seasons that span across the entire in-game year: Winter, Spring, Summer, Autumn. This affects the environment encountered in Höllvania.
The seasons span three months of in-game time:
- Winter: January, February, March
- Spring: April, May, June
- Summer: July, August, September
- Autumn: October, November, December
Seasons advance weekly at Monday 00:00 UTC.
Progress[]
Each season will provide a set of To Do challenges, Hex Overrides, Rewards, and Birthdays for the player to complete, listed in in-game dates. Once a task is completed, the calendar will advance to the next in-game date. Future days in the calendar can be previewed by selecting the day, although no selection can be made until the date advances. When the season ends, any tasks that are not completed are lost.
To Do[]
To Do tasks are challenges that are completed in Höllvania missions during the calendar year. Two challenges are offered per month, totaling to 6 per season. Tasks are given one at a time and must be completed in order of appearance.
| Name | Description | Notes |
|---|---|---|
| Starve the Beast | Destroy 75 / 150 / ? Containers | |
| By the Blade | Kill ? / 300 / ? Enemies with Melee Weapons | |
| Demonstration of Power | Kill ? / 500 / ? Enemies with Abilities | Seemingly requires the killing blow to come from the ability and not a DoT Effect generated by the ability |
| Punish Scaldra | Kill ? / 500 / 1000 Scaldra Troops | |
| Make It Personal | Kill 150 / 300 / 500 Scaldra Troops with Melee Weapons | |
| Shock and Awe | Kill 150 / 300 / 500 Scaldra Troops with Abilities | Seemingly requires the killing blow to come from the ability and not a DoT Effect generated by the ability |
| Purge the Infection | Kill ? / 500 / 1000 Techrot | |
| Electronic Waste Disposal | Kill 150 / 300 / 500 Techrot with Melee Weapons | |
| Null And Void | Kill 150 / 300 / 500 Techrot with Abilities | Seemingly requires the killing blow to come from the ability and not a DoT Effect generated by the ability |
| Ex-Eximus | Kill 10 / 20 / 30 Eximus | |
| Tankless Work | Destroy 1 Tank |
Prizes[]
Each in-game month has two prizes to select per month, awarding 6 prizes per season, offering a selection between two items.
- One or two of the following Arcane Enhancements:
- Base Archon Shards
Exilus Warframe Adapter- Exilus Weapon Adapter (built or blueprint)
- Primary Arcane Adapter
- Secondary Arcane Adapter
- Melee Arcane Adapter
- Aura Forma
- Forma (built or blueprint)
- Orokin Catalyst Blueprint
- Orokin Reactor Blueprint
- Riven Mod:
- 3-Day Affinity Booster/ Mod Drop Chance Booster/ Resource Drop Chance Booster
- These become active immediately when claimed.
- Kuva
- Vosfor
- Endo
Hex Override[]
Hex Overrides provide a selection of 3 buffs, for use exclusively within Höllvania missions. One override is offered per month, for a total of 3 per season. Buffs last for the entire in-game year until the next appearance of Winter 1999. Each Hex Override is attributed to a different member of The Hex, however selecting one will not grant chemistry with the related member.
Hex Overrides are one of two types: a Hex Boost or a Hex Factor. A Hex Boost is a passive effect, while a Hex Factor is an active effect that has some sort of trigger condition to apply (e.g. on casting abilities or hitting with a weapon). The same Hex Boost can be claimed again if it appears later in the calendar, and its effects will stack.
| Name | Description | Member |
|---|---|---|
| Bottled Lightning | Add 25% Status Damage and  Electricity Status Chance to all weapons |
Amir |
| Broadened Horizons | On Energy Pickup increase Ability Range by 10% for 10s | Aoi |
| Espresso Shots | Increase energy restoration by 2/s | Lettie |
| Got Your Back | Specters and Companions gain +250% damage | Eleanor |
| Harden Up | Increase Overshield cap by 50%. Kills grant 50 shields | Amir |
| Heavy Mags | Increase magazine capacity by 25% | Quincy |
| No Quarter | +25% Melee Attack Speed | Arthur |
| Power Gains | Increase Ability Strength +25% | Aoi |
| Practiced Precision | +20% Melee Critical Chance (x2 for Heavy Attacks) | Arthur |
| Psionic Feedback | On Damaged 10% chance to set off a 250 damage, 5m radius blast of  Radiation on taking damage. |
Eleanor |
| Punchcard | Add +1.5m Punch Through to primary weapons | Quincy |
| Thick Skin | Gain +250 Armor | Eleanor |
| Toxic Shot | Add 25%  Gas Status Chance to Primary and Secondary Weapons |
Quincy |
| Name | Description | Member |
|---|---|---|
| Combo Killer | Combo Multiplier increases the chance of enemies being susceptible to finishers after a melee hit. 5% per multiplier Max 65% with Venka Prime | Arthur |
| Cumulative Cartridges | +1% Status Chance per shot until reload | Quincy |
| Friendly Fallout | Attacks from Specters or Companions have a 25% chance to cause Radiation Status |
Eleanor |
| Force of Attraction |  Magnetic Status Effects also pull in enemies within 1m per stack |
Aoi |
| Have A Blast | Every 10th shot adds 10  Blast stacks on hit |
Quincy |
| Heavy Javelin | Heavy melee attacks trigger Radial Javelin with 3m range and 1000 damage scaling both with combo multiplier | Arthur |
| Involuntary Transfusion | Weakpoint kills have a 25% chance to generate a Universal Orb | Lettie |
| Magnetic Menace | Every 5th ability cast applies a Magnetic Status Effect to an enemy in front of you within 50m |
Aoi |
| More the Merrier | Non-Tenno Allies within 20m all gain +5% Melee Attack Speed and +20% Fire Rate for each one in range | Eleanor |
| Sharing is Caring | Every 10th ability cast makes the next one free for yourself and allies | Aoi |
| Overpower | Casting abilities increases Ability Strength by 2% and Ability Efficiency by -1% per unit of energy used by ability, for 5s. Capped at 150% Ability Strength and -75% Ability Efficiency | Aoi |
| Dynamo Jump | On landing from a bullet jump gain 50% Electricity Damage for 5s. |
Amir |
| Slice & Dice | Melee slide attacks increase slide attack Critical Chance by 5%, slide speed by 20% and reduce slide friction by 10% for 10 seconds with each slide melee attack. Max 10 stacks. | Arthur |
Hex Birthday[]
Each member of The Hex has a birthday. Chatting with them will award Chemistry with that member, though this is optional and can be skipped.
- Leticia: February 14th (Winter)
- Amir: May 23rd (Spring)
- Aoi: July 10th (Summer)
- Eleanor: November 2nd (Autumn)
- Arthur: November 3rd (Autumn)
- Quincy: December 4th (Autumn)
Patch History[]
Hotfix 38.0.7 (2025-01-14)
- The Overpower Hex Override (casting abilities increases Ability Strength by 2% and efficiency by -1% per unit of energy used by the ability for 5s) is now capped at +150% Ability Strength and -75% Efficiency.
- In addition to reaching unintentionally high damage numbers, without a cap players could crash from the infinite stacking after rapidly recasting abilities.
Hotfix 38.0.6 (2025-01-09)
- Once you complete all months in a 1999 Calendar Season, the sidebar in the Calendar screen will now indicate how long until the next season.
- Fixed 1999 Calendar date change SFX not respecting sound settings.
Hotfix 38.0.5 (2024-12-18)
- Fixed 1999 Calendar no longer displaying the “current” date once all events in the season have been completed.
- Now, it will display the last day in the month of the season once you’ve completed it.
- Also fixed the wrong date appearing on the desk calendar in a spoiler location.
- Fixed Birthday events in the 1999 Calendar not specifying a Protoframe and instead saying “The Hex” when accessing from the Höllvania Mall garage Pom-2.
Hotfix 38.0.4 (2024-12-17)
- Fixed black square appearing as the "More the Merrier" Hex Override HUD buff icon.
Hotfix 38.0.3 (2024-12-16)
- Fixed being able to send a Birthday message to Lettie from the 1999 Calendar more than once, allowing you to earn more than the intended Chemistry per Birthday interaction.
- Fixed PH tag appearing in the Broadened Horizons Hex Override description in the HUD buff list.
Hotfix 38.0.1 (2024-12-14)
- Fixed the "Kill X Eximus" 1999 Calendar To Do challenge not progressing when killing Eximus in Höllvania.
- Fixed description for the Arcane 1999 Calendar Prize not making sense. It now explains that Arcanes can be equipped on your gear.
Update 38.0 (2024-12-13)
- Introduced.
