Coordinate model
Tokyo is computed at 35.68°N, 139.65°E in Asia/Tokyo. The coordinate, not the country or timezone alone, controls the curve.
Weekly digest
Pick the categories you care about: movies, AI launches, sports, eclipses, and major public dates. One email per week, and never anything you did not ask for.
Want full preferences? Customize your digest →
Daylight curve
35.68°N · 139.65°E. Each vertical bar is one day of the year — bar height shows total daylight minutes.
Last updated recently. Daylight values are generated from the city coordinates and solar-position math during the page revalidation window.
Longest day
14.6h
2026-06-21
Shortest day
9.7h
2026-12-19
Average
12.2h
Δ seasonal
Today's solar window
Sunrise
4:25 AM
Solar noon
11:40 AM
Sunset
6:55 PM
Day length
14h 30m
Civil twilight (-6°)
3:55 AM to 7:25 PM
Nautical twilight (-12°)
3:18 AM to 8:02 PM
Astronomical twilight (-18°)
2:37 AM to 8:43 PM
Golden hour1h 52m total
4:07 AM to 5:02 AM · 6:18 PM to 7:13 PM
Blue hour23m total
3:55 AM to 4:07 AM · 7:13 PM to 7:25 PM
Seasonal checkpoints
March equinox
Mar 20
12h 8m
June solstice
Jun 21
14h 35m
September equinox
Sep 22
12h 9m
December solstice
Dec 21
9h 44m
Full-year edge cases: 0 polar-day entries and 0 polar-night entries in the 2026 curve.
City solar dossier
These rows bind the page to Tokyo's coordinates, local timezone, annual daylight spread, twilight availability, and peer-city curve rather than a reusable sunrise template.
Tokyo is computed at 35.68°N, 139.65°E in Asia/Tokyo. The coordinate, not the country or timezone alone, controls the curve.
4h 51m between Dec 19 (9h 44m) and Jun 21 (14h 35m).
Today resolves to sunrise 4:25 AM, solar noon 11:40 AM, and sunset 6:55 PM.
golden hour today 1h 52m; blue hour today 23m; longest golden-hour day Dec 21 — 1h 54m
365 days include astronomical darkness; 0 civil white-night days and 0 astronomical white-night days are modeled in 2026.
Los Angeles (4h 32m swing); Seoul (5h 12m swing); Buenos Aires (4h 39m swing); Auckland (5h 3m swing); Tel Aviv (4h 12m swing)
Solar evidence pack
This audit ties the page to a retained city route, exact coordinates, local timezone, a full-year daylight curve, twilight thresholds, and peer-city comparisons.
/sun/tokyo/ resolves to Tokyo, Japan; the route is generated only from the retained SUN_CITIES list.
35.68°N, 139.65°E; latitude band mid-latitude band; Northern Hemisphere.
Asia/Tokyo is used to anchor today's local sunrise, sunset, solar noon, and twilight windows.
365 daily daylight rows were computed for 2026; expected 365.
Longest Jun 21 (14h 35m), shortest Dec 19 (9h 44m), average 12h 11m.
Fastest gain Feb 21 (+3m from the previous day); fastest loss Aug 26 (-3m from the previous day); closest 12-hour day Sep 26 at 12h (no change from 12h).
Today: sunrise 4:25 AM, solar noon 11:40 AM, sunset 6:55 PM.
Golden Dec 21 — 1h 54m; blue Jun 21 — 24m; civil Jun 21 — 1h; astronomical night Dec 21 — 11h 13m.
365 days with astronomical darkness; 0 civil white-night days; 0 astronomical white-night days.
March equinox: 12h 8m; June solstice: 14h 35m; September equinox: 12h 9m; December solstice: 9h 44m
Los Angeles (4h 32m); Seoul (5h 12m); Buenos Aires (4h 39m); Auckland (5h 3m); Tel Aviv (4h 12m)
Solar thresholds are NOAA-style; timezone rules use IANA. The page is a planning model, not a legal almanac or obstruction-aware site survey.
Practical read
Photography
1h 52m golden hour today
Best annual golden-hour day: Dec 21 — 1h 54m. Blue-hour total today: 23m.
Astronomy
365 true-darkness days
Longest astronomical-night entry: Dec 21 — 11h 13m. Use local cloud cover and moon phase separately.
Outdoor routine
14h 30m daylight today
Sunrise 4:25 AM and sunset 6:55 PM are the practical day-boundaries for school runs, work windows, and outdoor activity.
Seasonal planning
4h 51m annual swing
June average 14h 32m; December average 9h 47m. This is the year-scale gap to check before travel or outdoor scheduling.
Travel comparison
10 retained peer curves
Tokyo's closest daylight-pattern peers here include Los Angeles (4h 32m annual swing), Seoul (5h 12m annual swing), Buenos Aires (4h 39m annual swing), Auckland (5h 3m annual swing).
Civil-light risk
Full civil-twilight bound all year
Civil twilight uses -6°. White-night counts matter because dawn/dusk phases stop behaving like ordinary morning/evening windows.
Calculation boundaries
What this model includes
Latitude, longitude, solar elevation thresholds, atmospheric-refraction sunrise/sunset convention, Asia/Tokyo local formatting, and a 365-day sweep for 2026.
What this model excludes
Mountains, skyline obstruction, sea horizon differences, weather, smoke, cloud cover, local legal definitions, aviation rules, and observer elevation.
When to verify elsewhere
Use official observatory, aviation, maritime, legal, or local almanac sources for high-stakes operations; this page is designed for planning, comparison, and general reference.
Why city pages differ
Two cities in Asia/Tokyo can still have different daylight and twilight curves because the coordinate pair, especially latitude, drives the result.
Seasonal daylight fingerprint
These values are derived from the same 365-day curve: threshold counts, fastest day-to-day change, the closest 12-hour balance, and monthly daylight averages.
14h+ daylight days
79
Days at or above fourteen hours of sun.
10h-or-less days
49
Short-day entries at ten hours or below.
Fastest gain
Feb 21 (+3m from the previous day)
Fastest loss
Aug 26 (-3m from the previous day)
Closest 12-hour balance
Sep 26 at 12h (no change from 12h)
Brightest month
June average 14h 32m
Shortest month
December average 9h 47m
Year-round photographer planning
Combined morning + evening windows, computed for every UTC day of the year.
Twilight phases reference
Solar elevation thresholds used on this page. All angles are measured from the true horizon at the city coordinate.
Sunrise / sunset · -0.833°
The sun's upper edge crosses the horizon. The negative value is atmospheric refraction (~34') plus the apparent solar disc radius (~16') — what almanacs call "official" sunrise/sunset.
Golden hour · 6° to -4°
Warm, low-angle light photographers and cinematographers plan around. Two windows per day — one in the morning, one in the evening.
Blue hour · -4° to -6°
Sky takes on deep, even blues; useful for cityscape photography because artificial lights and ambient sky balance.
Civil twilight · -6°
Brightest natural objects are still visible; outdoor activities don't need artificial light. Used in many legal definitions of dawn/dusk.
Nautical twilight · -12°
Horizon is just visible at sea, allowing celestial navigation; named for sailors taking sextant fixes.
Astronomical twilight · -18°
Sky is dark enough for deep-sky observation. After astronomical dusk and before astronomical dawn is when astrophotographers shoot.
Solar planning depth
Reference fields include Tokyo's route, coordinates, timezone, daylight extremes, twilight windows, white-night counts, peer curves, evidence checks, and calculation boundaries.
Frequently asked questions
These are selected by latitude and annual daylight swing, not by the generic city list, so the comparison is tied to Tokyo's actual solar profile.