Convert a date
Use the calendar picker for modern CE dates, or use the dropdown fields for CE/BCE conversion. BCE uses historical year numbering: 1 BCE is followed by 1 CE, with no year zero in the input.
Maya + Balinese cyclical calendrics
Mesoamerican & Balinese Calendar Converter
Enter a Gregorian date and convert it into the Maya Long Count, Tzolk'in, Haab', Calendar Round, and a parallel Balinese Pawukon cycle view. The tool runs entirely in the browser: Maya conversion uses the standard GMT correlation constant of 584283, while the Pawukon comparison uses Julian Day arithmetic anchored for reproducible computation.
Local browser calculation
GMT 584283
Pawukon 210-day comparison
No database required
Conversion result
Selected Gregorian date: ready.
Long Count
—
Baktun.Katun.Tun.Winal.K'in
Tzolk'in
—
13 numbers × 20 day signs
Haab'
—
18 months × 20 days + Wayeb'
Calendar Round
—
Tzolk'in and Haab' interlock
Lord of the Night
—
G-series, nine-day cycle
Balinese Pawukon
—
Wuku within a 210-day cycle
Weton / Concurrence
—
Saptawara × Pancawara pairing
Active Tzolk'in glyph
—
Original line-art cartouche rendering for the selected day sign.
Active Haab' glyph
—
Original line-art cartouche rendering for the selected Haab' period.
Active Pawukon line drawing
—
Schematic original SVG for the active wuku and concurrent Balinese cycles.
Export & share
Create a portable result link or generate a local PDF report for the selected date. The PDF is created in your browser; no server-side PDF library is required.
Calendar depiction
The display places the Mesoamerican and Balinese cycle sets side by side. Both use the same Gregorian input and Julian Day calculation. The Maya wheel preserves the original Tzolk'in and Haab' SVG glyph system; the Balinese wheel adds schematic Pawukon line drawings for wuku, Saptawara, Pancawara, and Triwara without pretending these are manuscript glyphs.
Mesoamerican calendar set
Outer ring: twenty Tzolk'in day signs. Inner ring: nineteen Haab' periods. Active positions are highlighted after conversion.
Calendar Round
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—
Active Tzolk'in sign
—
The 260-day cycle combines a number from 1-13 with one of twenty named day signs.
Active Haab' period
—
The 365-day Haab' cycle uses eighteen twenty-day periods followed by five Wayeb' days.
Lord of the Night
—
The Maya G-series is a nine-day count, shown here with epigraphic labels G1-G9 rather than uncertain deity names.
Julian Day Number
—
Long Count total days are calculated as JDN - 584283.
Balinese Pawukon set
Outer ring: thirty wuku. Inner rings: Saptawara, Pancawara, and Triwara. The center gives the Pawukon day and active weton pairing.
Pawukon
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—
Active Wuku
—
Thirty named seven-day wuku form the 210-day Pawukon cycle. The outer ring shows compact numeric abbreviations so all thirty line-art tokens remain legible.
Saptawara
—
Seven-day cycle shown for comparison with the wuku ring.
Pancawara
—
Five-day cycle used in the weton pairing with Saptawara.
Triwara
—
Three-day cycle shown because it is frequently emphasized in practical Pawukon explanations.
Position
—
Pawukon day, wuku number, day within wuku, and 35-day weton cycle position.
Method note
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This is arithmetic cycle visualization; ritual interpretation requires Balinese source-specific scholarship.
Examples & FAMSI quick-check mode
These examples give students immediate test cases for the converter. The quick-check runner validates the built-in arithmetic against fixed GMT/FAMSI-style anchors using correlation 584283, independent of the currently selected alternative correlation.
Validate against FAMSI-style GMT anchors
This mode is intentionally local. It does not scrape FAMSI; it checks the same GMT 584283 arithmetic against known anchor outputs so a deployed copy can be tested even if external sites are unavailable.
Glyph catalog
The converter embeds original SVG line-art directly in this page. Maya signs are interface reproductions based on standard day-sign and month forms, not scanned or copied manuscript plates. Balinese Pawukon drawings are schematic cycle tokens, not claimed manuscript glyphs or ritual icons. Use all drawings as visual aids alongside the listed sources.
Tzolk'in — 20 Day Signs
Haab' — 19 Periods
Balinese Pawukon — 30 Wuku Schematic Tokens
This catalog is the explicit Balinese scaffold attached to the Pawukon wheel: all thirty wuku are rendered as individual line-art tokens and the active wuku is highlighted from the current Gregorian conversion.
Sources & computation notes
This tool uses deterministic calendar arithmetic to show Mesoamerican and Balinese calendrical cycles from the same Gregorian input. The notes below document the computational assumptions, visual boundaries, and source cautions used by the converter.
Computational basis
- Default GMT correlation constant: 584283.
- Optional alternative constants are available for comparison with warnings.
- Long Count total days: Julian Day Number minus selected correlation.
- Known validation anchor: 2012-12-21 CE -> 13.0.0.0.0, 4 Ajaw, 3 K'ank'in, G9.
- Balinese Pawukon comparison: 210-day unnumbered cycle, with JDN 146 used as a reproducible computational anchor following Dershowitz and Reingold.
FAMSI reference
FAMSI's Date Conversion tool is treated as the comparative reference for GMT-style conversion. The local quick-check mode validates fixed anchors rather than scraping FAMSI at runtime, preserving reliability during classroom, field, or offline review.
Balinese Pawukon module
The Pawukon visualizer emphasizes wuku plus the 3-, 5-, and 7-day cycles because these are the clearest comparative rings. Other Pawukon cycles exist; they are not reduced here to invented iconography or unsupported ritual meanings.
Academic caution
Calendar conversion is arithmetic; cultural interpretation of day names, ritual associations, glyph variants, regional usage, G-series night-lord identifications, and Balinese ceremonial meanings requires careful source-specific scholarship. This tool should be treated as a converter and visualizer, not as an authority on all Maya or Balinese calendrical practice.
Suggested bibliography: FAMSI Date Conversion and Calendrics; Smithsonian NMAI Living Maya Time; Thompson 1962; Aveni 2001; Macri & Looper 2003; Macri & Vail 2009; Looper, Macri, Polyukhovych & Vail 2022 Maya Hieroglyphic Database; Geertz 1973; Eiseman 1989/1990; Dershowitz & Reingold, Calendrical Calculations, chapter on the Balinese Pawukon calendar. Maya glyph renderings and Balinese Pawukon tokens are original embedded SVG line art made for this Stella Nova interface.
Methodological note
The methodological note documents the converter's computational assumptions, source boundaries, and interpretation limits. It is embedded below for inline review and included as methodological_note.pdf in the deployment package.
Research comments
Add date-specific notes, source cautions, or teaching comments. This section uses a small JSON file instead of a database, and each entry stores the selected calendar result for context.