When is the best day to launch a business in December 2026?

The month's best stretch opens Thu, Dec 17, 10:00 AM EST and holds until Sat, Dec 19, 11:00 AM EST, scoring 76 against a base of 50, computed in America/New York (Eastern Time). Scores compare moments; they do not promise results.

How are these scores computed?

Every hour is rated on four factors — the Moon void-of-course, Mercury retrograde, the Moon's phase, and its next applying aspect for this kind of decision — then averaged per local day under a versioned config. These pages stop there, because a page has no location; the app adds a fifth factor, the Moon's house, once it knows where you are, which is what lets it name an hour rather than a day. Scores start at 50. Higher scores mean more favorable conditions under Orrery’s rules, not a higher chance of success. Check the times against your availability.

What does void-of-course mean?

The interval after the Moon's last exact major aspect in a sign, until it enters the next. Orrery uses a modern definition and assigns a score penalty to starts during this interval.

Launch / publish — December 2026

The best days to launch a business in December 2026.

Computed in America/New York (Eastern Time). Event and interval times include their Eastern Time zone label (EDT or EST). A different timezone shifts the day boundaries — the sky doesn’t change, but the local days it lands in can.

You’ve got the launch on the calendar. Here is December 2026, scored for launching: every hour rated on the Moon void-of-course, Mercury retrograde, the Moon’s phase, and its next applying aspect for this decision — then averaged per day. Scores start at 50. Higher scores mean more favorable conditions under Orrery’s rules, not a higher chance of success. Check the times against your availability.

The month’s best stretch opens Thu, Dec 17, 10:00 AM EST and holds until Sat, Dec 19, 11:00 AM EST, scoring 76.

Amber rows below are the days that stretch touches. Scores compare moments; they do not promise results.

Rows list factors in that day’s hourly samples. An applying aspect’s exact date can fall on a later day.

Date	Day	Score	The computed sky
Dec 1	Tue	38	Waning Moon (sampled hours)
Dec 2	Wed	29	Applying Moon–Jupiter sextile · exact Fri, Dec 4, 2026, 5:40 PM ESTWaning Moon (sampled hours)Void-of-course Wed, Dec 2, 2026, 4:10 AM EST – Wed, Dec 2, 2026, 3:03 PM EST
Dec 3	Thu	46	Applying Moon–Jupiter sextile · exact Fri, Dec 4, 2026, 5:40 PM ESTWaning Moon (sampled hours)
Dec 4	Fri	38	Applying Moon–Jupiter sextile · exact Fri, Dec 4, 2026, 5:40 PM ESTWaning Moon (sampled hours)Void-of-course Fri, Dec 4, 2026, 5:40 PM EST – Fri, Dec 4, 2026, 11:35 PM EST
Dec 5	Sat	30	Applying Moon–Jupiter square · exact Mon, Dec 7, 2026, 4:07 AM ESTWaning Moon (sampled hours)
Dec 6	Sun	30	Applying Moon–Jupiter square · exact Mon, Dec 7, 2026, 4:07 AM ESTWaning Moon (sampled hours)
Dec 7	Mon	38	Applying Moon–Jupiter square · exact Mon, Dec 7, 2026, 4:07 AM ESTApplying Moon–Jupiter trine · exact Wed, Dec 9, 2026, 4:06 PM ESTWaning Moon (sampled hours)Void-of-course Mon, Dec 7, 2026, 4:07 AM EST – Mon, Dec 7, 2026, 10:06 AM EST
Dec 8	Tue	56	Applying Moon–Jupiter trine · exact Wed, Dec 9, 2026, 4:06 PM ESTWaning Moon (sampled hours)Waxing Moon (sampled hours)
Dec 9	Wed	66	Applying Moon–Jupiter trine · exact Wed, Dec 9, 2026, 4:06 PM ESTWaxing Moon (sampled hours)Void-of-course Wed, Dec 9, 2026, 4:06 PM EST – Wed, Dec 9, 2026, 10:08 PM EST
Dec 10	Thu	53	Waxing Moon (sampled hours)Void-of-course Thu, Dec 10, 2026, 2:12 PM EST – Sat, Dec 12, 2026, 11:05 AM EST
Dec 11	Fri	37	Waxing Moon (sampled hours)Void-of-course Thu, Dec 10, 2026, 2:12 PM EST – Sat, Dec 12, 2026, 11:05 AM EST
Dec 12	Sat	44	Applying Moon–Jupiter opposition · exact Mon, Dec 14, 2026, 5:39 PM ESTWaxing Moon (sampled hours)Void-of-course Thu, Dec 10, 2026, 2:12 PM EST – Sat, Dec 12, 2026, 11:05 AM EST
Dec 13	Sun	50	Applying Moon–Jupiter opposition · exact Mon, Dec 14, 2026, 5:39 PM ESTWaxing Moon (sampled hours)
Dec 14	Mon	47	Applying Moon–Jupiter opposition · exact Mon, Dec 14, 2026, 5:39 PM ESTWaxing Moon (sampled hours)Void-of-course Mon, Dec 14, 2026, 5:39 PM EST – Mon, Dec 14, 2026, 11:35 PM EST
Dec 15	Tue	62	Waxing Moon (sampled hours)
Dec 16	Wed	62	Waxing Moon (sampled hours)
Dec 17	Thu	61	Applying Moon–Jupiter trine · exact Sat, Dec 19, 2026, 10:12 AM ESTWaxing Moon (sampled hours)Void-of-course Thu, Dec 17, 2026, 12:42 AM EST – Thu, Dec 17, 2026, 9:34 AM EST
Dec 18	Fri	76	Applying Moon–Jupiter trine · exact Sat, Dec 19, 2026, 10:12 AM ESTWaxing Moon (sampled hours)
Dec 19	Sat	62	Applying Moon–Jupiter square · exact Mon, Dec 21, 2026, 12:26 PM ESTApplying Moon–Jupiter trine · exact Sat, Dec 19, 2026, 10:12 AM ESTWaxing Moon (sampled hours)Void-of-course Sat, Dec 19, 2026, 11:39 AM EST – Sat, Dec 19, 2026, 3:29 PM EST
Dec 20	Sun	54	Applying Moon–Jupiter square · exact Mon, Dec 21, 2026, 12:26 PM ESTWaxing Moon (sampled hours)
Dec 21	Mon	54	Applying Moon–Jupiter sextile · exact Wed, Dec 23, 2026, 12:01 PM ESTApplying Moon–Jupiter square · exact Mon, Dec 21, 2026, 12:26 PM ESTWaxing Moon (sampled hours)Void-of-course Mon, Dec 21, 2026, 12:26 PM EST – Mon, Dec 21, 2026, 5:27 PM EST
Dec 22	Tue	70	Applying Moon–Jupiter sextile · exact Wed, Dec 23, 2026, 12:01 PM ESTWaxing Moon (sampled hours)
Dec 23	Wed	59	Applying Moon–Jupiter sextile · exact Wed, Dec 23, 2026, 12:01 PM ESTWaning Moon (sampled hours)Waxing Moon (sampled hours)Void-of-course Wed, Dec 23, 2026, 12:01 PM EST – Wed, Dec 23, 2026, 4:58 PM EST
Dec 24	Thu	34	Waning Moon (sampled hours)Void-of-course Thu, Dec 24, 2026, 7:09 PM EST – Fri, Dec 25, 2026, 4:12 PM EST
Dec 25	Fri	24	Applying Moon–Jupiter conjunction · exact Sun, Dec 27, 2026, 11:38 AM ESTWaning Moon (sampled hours)Void-of-course Thu, Dec 24, 2026, 7:09 PM EST – Fri, Dec 25, 2026, 4:12 PM EST
Dec 26	Sat	50	Applying Moon–Jupiter conjunction · exact Sun, Dec 27, 2026, 11:38 AM ESTWaning Moon (sampled hours)
Dec 27	Sun	38	Applying Moon–Jupiter conjunction · exact Sun, Dec 27, 2026, 11:38 AM ESTWaning Moon (sampled hours)Void-of-course Sun, Dec 27, 2026, 11:38 AM EST – Sun, Dec 27, 2026, 5:12 PM EST
Dec 28	Mon	38	Waning Moon (sampled hours)
Dec 29	Tue	22	Applying Moon–Jupiter sextile · exact Thu, Dec 31, 2026, 10:27 PM ESTWaning Moon (sampled hours)Void-of-course Tue, Dec 29, 2026, 5:17 AM EST – Tue, Dec 29, 2026, 9:26 PM EST
Dec 30	Wed	46	Applying Moon–Jupiter sextile · exact Thu, Dec 31, 2026, 10:27 PM ESTWaning Moon (sampled hours)
Dec 31	Thu	45	Applying Moon–Jupiter sextile · exact Thu, Dec 31, 2026, 10:27 PM ESTWaning Moon (sampled hours)Void-of-course Thu, Dec 31, 2026, 10:27 PM EST – Fri, Jan 1, 2027, 5:15 AM EST

How to read this

Void-of-course— after the Moon’s last exact aspect in a sign, before it enters the next. The classical read: finish things; don’t start them. Exact times are in the void calendar for December 2026. Mercury retrograde — the traditional caution for messages, deals, and signatures; station times to the second are in the retrograde dates. Waxing / waning — growing favors starts, thinning favors finishing. The applying aspect— the Moon’s next exact contact with this decision’s planet, easy angles helping, hard angles dragging. The full rulebook — which conventions Orrery follows and which it refuses — is in Method.

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Engine 0.6.1 · config v3 · JPL de440s.bsp · tzdata 2026.3. Rankings use the computed conditions and the scoring rules published in Method.