Granblue fantasy

Yesterday, I saw when the event ends. I panicked, grinded until 3 AM, and farmed for the Sandalwood creature until it reached level 80. Today, I saw that they extended the event. I cursed a lot. Then I went to grind a little bit more. I quickly got another copy, leveled it up to 100, fed it summons up to level 95, and now I'm happily enjoying my first "husbando" in GBF.

Also, can someone explain the Gacha schedule? On the wiki, I found that the premium gacha runs at the end of the month. But I need Lucy, and he's from the flash gacha. I couldn't find when the flash gacha runs (and there's also a weird fox