all-year

[awl-yeer]

adjective

taking up, extending through, or occurring continually during a year: an all-year activity.
open all year, as for business or occupancy: an all-year resort.
usable or productive during all parts of a year: all-year pasture; all-year fishing grounds.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for all-year

Christian New York never had an all-year bath-house until now.
The Battle with the Slum
Jacob A. Riis.
On the other hand, it is difficult to explain the failure of the diarist to mention the Mokelumne, an all-year stream.
Colonial Expeditions to the Interior of California Central Valley, 1800-1820
Sherburne Friend Cook
Now, without warning, he was driven to relegate himself to the lower levels of a sort of all-year Lenten penance.
The Brentons
Anna Chapin Ray