Happy Mid-Autumn Festival! I'm going to coin 5 festival-related numbers every year!
Lantern = 815 -> 815 -> 815 -> 815 -> 815 in Chained arrow notation (Class 8: Linear omega level)
Mooncake = s(815, 815 {1 ,, 1, 16} 2) in SAN (Class 19: Higher computable level)
Starfruit = 815[0{0 ,_{2} 1} 1]815 in UNAN (Class 18: Bachmann's collapsing level)
Super moon = E815x^(&(34))815 in Solidus-Extended Cascading-E Notation (Class 18: Bachmann's collapsing level)
Hairy crab = g_{ψ0(Ω^Ω^Ω^Ω)} in FGH with respect to Buchholz's ψ (Class 13: Double exponentiated omega level)