every day; daily
術後、患者の容態は目に見えて日毎に良くなった。
After the surgery, the patient's condition visibly improved day by day.
秋は日毎に寒くなる。
Autumn gets colder day by day.
咲き始めた花は日毎に姿を変える。
The flower that began to bloom changes its appearance day by day.