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Hours of Prayer & the Heavens

When you look up to the heavens — sun, moon, and the appointed hours
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Moon elongation now: —
Location — 🌍 Google Earth ↗
Coordinates Exact latitude/longitude entry — overrides the search above.
View date —
Tools Readings ↗
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Daylight band through the year for the chosen location · ▲ expected first crescent · ● new moon (conjunction) · ○ full moon · vertical lines: equinoxes & solstices · ☀/☾ eclipses — drag the slider and every tool on this page follows.
The Day Divided into Twelve
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“Are there not twelve hours in the day?” — the daylight from sunrise to sunset, divided into twelve equal parts.

Crescent Visibility Map & Day Slider

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Zone 1 — easily visible with the naked eye Zone 2 — visible with the naked eye in good conditions Zone 3 — not visible with the naked eye ★ your location · ☀ sun overhead · ☾ moon overhead · shaded = night at the slider time
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Hours of Prayer — 3rd · 6th · 9th

Sun & Twilights

Moon

Next New-Moon Crescent

Eclipses (NASA)

Month View — Elongation at Sunset

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Visibility thresholds used on this page (sun–moon elongation at local sunset, waxing moon): under 10.5° — not expected visible to the naked eye  ·  10.5° – 10.85° — Possible But Uncertain (an “iffy” evening — watching and witness reports decide)  ·  10.85° and above — Expected Visible In Most Cases, weather and horizon permitting.
Expected first crescent (≥ 10.85° at sunset, waxing — evenings at 10.5°–10.85° are Possible But Uncertain) 🌑 conjunction (new moon) 🌕 full moon ❗ possible eclipse ↑ waxing · ↓ waning today

Equinoxes & Solstices — Rule of the Equinox

Orbits — Earth & Moon Positions for the Viewed Day

Moon Phases, Perigee & Apogee — Viewed Year

Mazzaroth — Sun & Moon Among the Constellations (Job 38:32)

Years & Cycles — Sabbatical (Shemitah) & Jubilee

Omer Count — Fifty Days to Shavu'ot

Eclipse Finder — All Eclipses of the Viewed Year

Year Overview — New Moons & Expected Sighting Evenings
Open to compute the year…
Methods, Zones & Resources

Hours of prayer. The daylight from sunrise to sunset is divided into twelve equal parts; the 3rd, 6th, and 9th hours are the ends of the 3rd, 6th, and 9th twelfths (Matthew 20, John 11:9, Acts 3:1).

Crescent thresholds. Two tiers are used (geocentric sun–moon elongation at local sunset, waxing moon): 10.5° – 10.85° — Possible But Uncertain: the crescent could be sighted, watching and witness reports decide; 10.85° and above — Expected Visible In Most Cases, weather and horizon permitting. The "expected" evening highlighted on this page uses the 10.85° standard, but an evening in the uncertain band may prove to be the true first crescent.

Map zones. For every point on the map, the moment of that place's local sunset on the viewed date is computed, then: Zone 1 — elongation ≥ 12.5° with the moon at least 7° high at sunset (easily visible); Zone 2 — elongation ≥ 10.85° with the moon above the horizon (visible in good conditions); Zone 3 — elongation under 10.85°, or the moon is on/below the horizon at sunset (not expected; evenings in the 10.5°–10.85° band are Possible But Uncertain rather than strictly invisible). Because sunset sweeps westward, the zones open toward the west — the same characteristic curves seen on classical crescent-visibility charts. The map backdrop is NASA Blue Marble imagery (public domain), served from this site — if the image is unavailable, simplified outline continents are drawn instead; all zone math is original to this page.

Ancient & future dates. Years are entered with the AD / BC buttons (year 4 with BC selected = 4 BC; supported back to 4500 BC and forward to 9999 AD). Calculations include the ΔT correction for Earth's slowing rotation (about 3 hours by 1 AD), without which ancient moon times are badly wrong. Dates are shown in the standard (proleptic Gregorian) calendar with the Julian-calendar equivalent displayed beside ancient dates; the year-from-creation count follows WYLH reckoning (2026 AD = 5937). Precision gradually decreases for the most ancient dates.

Day/night shading. The slider shades the night side of the flat map at the chosen moment and places ☀ and ☾ where the sun and moon are directly overhead.

Compare & verify (external tools). UKHO Websurf 2.0 crescent visibility indicator ↗ · UKHO Websurf ↗ · USNO sun & moon data for one day ↗ · NASA SKYCAL sky-events calendar ↗ · EliYah new-moon visibility charts ↗ · WYLH Biblical Calendar page ↗

Notes. All times are computed for the location set above and displayed in your device's local time zone. Solar hours follow the daylight from sunrise to sunset divided into twelve equal parts; the 3rd, 6th, and 9th hours of prayer are the ends of the 3rd, 6th, and 9th twelfths.

First-crescent guidance uses two tiers at local sunset on a waxing moon: 10.5°–10.85° elongation — Possible But Uncertain (could be the first crescent); 10.85°+ — Expected Visible In Most Cases. Actual sighting depends on the eye, the horizon, and the weather — witnesses decide. Eclipse flags mark new/full moons near the lunar nodes; confirm details in the NASA tables.

All astronomy on this page is computed in your browser from standard published algorithms (Jean Meeus, Astronomical Algorithms — truncated series; sun ±0.01°, moon a few hundredths of a degree); no calendar or astronomical data is pulled from any other website. Map backdrop: NASA Blue Marble imagery (public domain), served from this site. Location search & reverse geocoding only: data © OpenStreetMap contributors (Nominatim), Open-Meteo, and Zippopotam.us. Tip: the ← and → arrow keys step one day. Shareable links: add ?lat=…&lon=…&date=YYYY-MM-DD to the page URL. Hallelu-YAH.