A proverb meaning 'every day is a good day' — accept and appreciate each day; often used in Zen contexts.
忙しくても、日々是好日だと考えれば気持ちが楽になる。
Even when busy, thinking 'every day is a good day' makes you feel lighter.
茶道の先生がよく『日日是好日』と言っていた。
The tea master often said, 'Every day is a good day.'
旅行中は小さな出来事も楽しんで、まさに日々是好日だった。
During the trip I enjoyed even small things—truly every day was a good day.