SEOUL, SOUTH KOREA — A housewife who failed to prepare lunch for her husband on schedule because she forgot to adjust her watch for daylight-saving time killed herself yesterday, the Yonhap News Agency said.

South Korea instituted daylight-saving for the first time since 1961.

Roh Ki Hwa, 34, was one hour late in preparing her husband's noon meal Sunday because she forgot to set her watch one hour ahead before she went to sleep Saturday night. South Korea instituted daylight- saving time on Sunday for the first time since 1961.

Roh accompanied her husband to a picnic attended by about 70 other people Sunday but left to sightsee with her 6-year-old daughter, the news report said. Because her watch was not adjusted, Roh did not return in time to prepare lunch for her husband, Paek Un Yong, 40.

The news agency said Roh hanged herself yesterday at her home in eastern Seoul, apparently because she felt deeply embarrassed about committing her error in front of the other picnic guests.