Additionally, Snowdin Town, Dating Start!, and Hometown Day feature a remixed version of the melody, suiting a more christmas-ey, welcoming atmosphere:
('Snowdin Town', as heard in Snowdin Town)
The motif is (unusrprisingly) used in relation to Snowdin, and is often paired with the 'Hopes and Dreams' leitmotif, which serves a more active role in both Undertale and Deltarune.