IMC has not posted the event information and I’m not sure when/if they will. Here are the weekend bonuses for April.
4/3: Looting Chance +1000, 50% off reidentify costs
4/4: Reset Legend & Uphill Raids, Remove penalty for gem enhancing
4/5: Unique raid double drop/no stone cost increase
4/10: Transcend 50% off even values
4/11: Looting Chance +1000, HP/SP Regen
4/12: Looting Chance +1000, HP/SP Regen
4/17: 50% off reidentify costs
4/18: Reset Legend & Uphill Raids, Skill cooldown/SP cost -90% in leveling dungeons
4/19: Skill cooldown/SP cost -90% in leveling dungeons, Unique raid double drop/no stone cost increase
4/24: Transcend 50% off even values
4/25: Looting Chance +1000, HP/SP Regen
4/26: Looting Chance +1000, HP/SP Regen