Yep. I took a look at the best calendar years recently with the crazy years McKinnon/Kucherov/McDavid are having and that Jagr year is insane especially with how much better it is than the seasons it is sandwitched between. Same thing goes for Dionne in 1979 (149 points in 80 games) who ''only'' had 137 and 130 points in those 2 seasons. Yzerman did it right and actually peaked in seasons as we can see in his calendar scoring which is not as impressive as his seasons:
1987: 81-47-67-114
1988: 65-59-62-121
1989: 81-55-76-131
1990: 80-58-65-123
1991: 77-46-52-98
1992: 83-56-63-119
1993: 53-33-61-94
1994: 48-20-47-67
Don't forget that Yzerman got injured in early 1988, missing around 16 (?) games, so his calendar totals for that year will be lower than otherwise. If no injury, you probably throw another 20-25 points onto the 1988 total and then he has 145 or so.
Now, you've made me curious about other players and their calendar totals:
Gretzky
1980 -- (80GP) 140 points
(1st)
1981 -- (85GP) 216 points
(1st)
1982 -- (79GP) 199 points
(1st)
1983 -- (80GP) 214 points
(1st)
1984 -- (71GP) 200 points
(1st)
1985 -- (81GP) 196 points
(1st)
1986 -- (81GP) 213 points
(1st)
1987 -- (79GP) 175 points
(1st)
1988 -- (64GP) 149 points
(2nd)
1989 -- (78GP) 162 points
(2nd)
1990 -- (72GP) 132 points
(1st)
1991 -- (73GP) 145 points
(1st)
1993 -- (82GP) 128 points
(3rd)
1996 -- (83GP) 106 points
(4th)
1998 -- (75GP) 91 points
(2nd)
Lemieux
1985 -- (82GP) 125 points
(4th)
1986 -- (74GP) 130 points
(2nd)
1987 -- (65GP) 124 points
(2nd)
1988 -- (79GP) 200 points
(1st)
1989 -- (78GP) 171 points
(1st)
1991 -- (62GP) 119 points
(4th)
1992 -- (66GP) 158 points
(1st)
1996 -- (75GP) 133 points
(1st)
2002 -- (50GP) 85 points
(4th)
Jagr
1995 -- (84GP) 149 points
(1st)
1996 -- (84GP) 127 points
(2nd)
1998 -- (72GP) 96 points
(1st)
1999 -- (84GP) 152 points
(1st)
2001 -- (75GP) 111 points
(1st)
2006 -- (83GP) 114 points
(3rd)
McDavid
2017 -- (83GP) 102 points
(2nd)
2018 -- (81GP) 121 points
(1st)
2019 -- (82GP) 122 points
(1st)
2021 -- (87GP) 157 points
(1st)
2022 -- (87GP) 143 points
(1st)
2023 -- (76GP) 129 points
(2nd)
2024 -- (62GP) 109 points
(3rd)