There are various synonyms for the phrase "daylight hours". "Daytime" is one of the most common alternatives, which refers to the period of the day when the sun is visible in the sky. Another synonym is "daytime hours" which specifically refers to the time of day when the sun is up. "Sunlit hours" and "sunshine hours" both emphasize the role of the sun in the time period, while "daytime period" and "sunshine duration" are more technical descriptions. "Daytime interval" and "daytime segment" are other synonyms that can be used interchangeably with "daylight hours", while "waking hours" may be used to imply the time one is awake and active during the day.