In Animal Crossing: New Horizons, Leif was added as a travelling vendor who shows up every once and awhile to the player's island.
With the amount of travelling vendors in the game, it's rare to see certain ones show up at your island and this can sometimes go on for long stretches of time.
When Does Leif Visit in New Horizons?
So, when does Leif visit islands in Animal Crossing?
Like other travelling vendors in the game, Leif will show up in the town's plaza outside of Resident Services on a random cycle.
It's much more likely for players to see him around Nature Day, but when he does visit the island, he can be found from 5 a.m. to 10 p.m. in all time zones.
Leif's Permanent Shop
As of the game's 2.0 update, Leif can now be invited to open a permanent shop on Harv's island.
For this to happen, the player must unlock Harv's island by visiting when prompted to after speaking to Harv himself.
After the first visit, the player will later receive a letter from Harv asking for them to visit and, once they arrive, Harriet and Harvey will give the player to donate 100,000 bells to Lloid the Gyroid so Leif can open his own shop on the island.
On the start of the next day, Leif will have a permanent shop and will give the player the same options that they'd get if he was just visiting their island.