second half of the year; last half-year
Refers to the latter six months of a calendar year, fiscal year, or academic year. Often used in business, accounting, or planning contexts.
Our company's performance in the second half of the year was strong.
We need to review the budget for the second half of the year.
Compound of 後 (こう, 'after, later') + 半期 (はんき, 'half-year period'). The reading is on'yomi throughout.