I’m calling this confirmed - Currently on Zane right this moment, photo-mode is showing 0:32 meaning it should be morning and X3 is active.
So cryo and X3 projectiles during the day. No projectile multiplier and fire damage at night.
Regardless, it’s been a really good SMG I’ve spent a lot of time behind and made many, many kills with. I still think that a better way to know what time it is in-game would be helpful, and some additional clarification in the weapon description should be added. (I know, legendary items may have additional features that might not be “documented”. Still, you can’t use those things you don’t even know exist.)
Edit: Immediately upon writing this I was back in combat, and setting mobs on fire. This probably wasn’t from the Night Hawkin though, as the Knife Drain Victory Rush I have equipped has +16% incendiary damage and +27% ignite chance. Keep in mind other pieces of gear and skills can also contribute to or create elemental damage.
PS. If anyone has a spare Ice Breaker Victory Rush or Snowdrift Victory Rush they might be willing and able to part with, I can be mailed on Xbox at the same gamertag as my forum name.