yearlong

Adjective

not-comparable

Lasting one year; of a timespan of one year. / Which lasts throughout every year; which is not seasonal

Japanese Meaning

1年間続く / 一年を通じて持続する / 1年を通して起こる

The yearlong conservation program begins next month to protect the wetlands.

その1年間にわたる保全プログラムは来月、湿地を保護するために始まります。

Sense（1）

Lasting one year; of a timespan of one year.

Both are congruent with a yearlong periodicity, which is apparently neutralized in the main settlement.

Sense（2）

Which lasts throughout every year; which is not seasonal

Yearlong manning is needed, although at a somewhat reduced level from the peak periods in the fall.