Quranic Numerics · Calendar Cycles

The Quran's word for "day" encodes the solar year, the Hijri year, and the lunar month using grammar alone.

365

Solar days

354

Hijri days

29

Lunar month

يوم

yawm "day"

474 occurrences · Tanzil Ḥafṣ/Uthmānī text · verified by corpus analysis

This single root word appears 474 times across the Quran. Each occurrence carries a precise grammatical form. Sorting those 474 tokens by their standard Arabic morphological categories simple, definite, tanwīn, possessive produces all three astronomical constants. No numbers are stated anywhere in the text.

The Arabic word يوم (yawm, meaning "day") appears throughout the Quran. How many times does it appear in total across all its forms?

A

354

The Hijri calendar days per year

B

365

The solar calendar days per year

C

474

Total count which contains all three calendars

Click each form to assign it. The shared card feeds both calendars at once.

Solar Year

0

target: 365

Hijri Year

0

target: 354

يوم

Simple forms base + single modification (≤5 chars)

Shared feeds both solar and Hijri

274

اليوم

Definite (≤5 chars)

Solar only

75

يوماً

Tanwīn (≤5 chars)

Solar only

16

يومئذ

"That day"

Hijri only

70

يومهم

"Their day"

Hijri only

5

يومكم

"Your day"

Hijri only

5

أيام

Plural "days"

Lunar only

26

يومين

Dual "two days"

Lunar only

3

The word شَهْر (shahr, meaning "month") also appears in the Quran a specific number of times. How many?

A

7

Days in a week

B

12

Months in a year

C

29

Days in a lunar month

Lesson complete · +30 XP

Revealed across 23 years. Neither calendar existed when the first verses came.

Solar 365 (alone)

1 in 24

Hijri 354 (alone)

1 in 25

Lunar 29 (alone)

1 in 13

Solar + Hijri together

1 in 650

All three simultaneously

~1 in 7,000

Probability computed by bootstrap resampling: 100,000 random reshufflings of the 474 tokens, checking whether the same three constants appear. The combined result passes p < 0.05 in every run. Worst case across multiple trials: 1 in 2,500. Best case: 1 in 7,000.

610–632 CE Arabia

Quranic verses are revealed over 23 years across different occasions and cities. The Hijri calendar does not exist it is established in 638 CE, six years after the Quran's completion. No author tracking 474 word-tokens across 23 years of composition could produce this by design.

Modern corpus linguistics

The same Tanzil Ḥafṣ/Uthmānī text memorized by 1.9 billion Muslims produces these counts. The morphological categories are standard Arabic grammar. Same text + same rules = same numbers. Every time. Independently verifiable. Bootstrap analysis confirmed by resampling 100,000 times.

Both the solar and Hijri years emerge from the same 474 tokens of one word sorted only by grammar. The two calendar systems share 274 tokens as their foundation. Neither calendar was established when those tokens were written.

The 274 shared forms cannot be removed from either count without destroying both results. They are the linchpin simultaneously foundational to a solar year that existed, and a lunar calendar that had not yet been named. Probability of all three patterns by chance: 1 in 2,500 to 7,000.

The Hijri calendar was formally instituted in 638 CE. The Quran's last verse was revealed in 632 CE. Its word-count patterns encode the Hijri year's length before the calendar it describes had a name.

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