HowLongDay

HowLongDay とは？

HowLongDay shows exactly how much daylight you'll get today — sunrise, sunset, golden hour, blue hour and day length — for any of 49,000+ cities worldwide, down to the minute. No sign-up, no ads blocking the data, just the numbers you need for planning a shoot, a round of golf, a hike, or a flight before dark. Every city also gets a full year-ahead daylight chart and month-by-month calendars, so you can see how the light will change before you book the trip.