noun
season opening
Wasei-eigo term used for the start of a seasonal activity, such as ski season, hunting season, or fishing season. Not used for general 'season opener' in sports.
wasei-eigo (Japanese-coined English), from season open
スキー場のシーズンオープンは12月中旬です。
The ski resort's season opening is in mid-December.
今年の釣りのシーズンオープンはいつですか？
When is the fishing season opening this year?