Luuk Herssen’s rerun in WuWa hasn’t happened yet as of June 26, 2026; the sources I found only confirm Luuk as a new 3.1 character who debuted on February 26, 2026, alongside Galbrena’s banner rerun, not a separate Luuk rerun.

What that means

  • Luuk’s first banner ran from February 26, 2026 to March 18, 2026.
  • The available banner coverage for later updates I found does not show a Luuk rerun date yet.
  • So the honest answer is: 0 days since a Luuk rerun, because no rerun has been confirmed in the sources I found.

If you meant his debut

  • From February 26, 2026 to June 26, 2026 is about 120 days , or just under 4 months.

Quick note

If you meant a different WuWa character, like Galbrena or another 3.1 banner unit, I can map that timing too.