Hexadecimal Time & Retro Formats Converter

Q: What is hexadecimal time?

The day is divided into **0x0000 (midnight) to 0xFFFF** units (one unit ≈ 1.318 seconds). Popularized by hex clocks: 0x8000 = noon.

Q: What is GameCube system time?

Seconds since **2000-01-01 00:00:00** stored in the RTC of the GameCube/Wii. The converter produces the integer for memory dumps.

Q: What is a Lotus 1-2-3 serial date?

Days since **1899-12-30** — the same convention Excel later adopted (hence Excel's 1900 leap bug compatibility).

Retro and embedded systems timestamp in unusual ways: Hexadecimal time (day split into 0x0000–0xFFFF), GameCube system time (seconds since 2000-01-01), and Lotus 1-2-3 serial dates (days since 1899-12-30, like Excel).

This converter renders your date-time in each retro representation for game preservation, emulator development and vintage data files.

Timezone:

Enter a date-time above to see the conversion results.

Hexadecimal Time & Retro Formats Converter Quick Reference

Format	Pattern / Description	Example 1	Example 2
Hexadecimal Time	0x0000 - 0xFFFF	0xF000	0x5555
GameCube System Time	Counter from 2000-01-01	839946600	820540800
Lotus 1-2-3 Serial	Bug Compatible (1900 Leap)	46247.6041666667	46023.0000000000

* Examples are rendered in UTC for the fixed sample instants above.

When to Use Hexadecimal Time & Retro Formats

Emulator & homebrew development

Generate GameCube/retro timestamps for save files and RTC emulation test vectors.

Vintage spreadsheet import

Decode Lotus 1-2-3 serial dates when reading 90s-era financial spreadsheets.

Creative coding

Use hexadecimal time as a compact, cool-looking clock for art installations and demos.

Frequently Asked Questions

What is hexadecimal time?

The day is divided into 0x0000 (midnight) to 0xFFFF units (one unit ≈ 1.318 seconds). Popularized by hex clocks: 0x8000 = noon.

What is GameCube system time?

Seconds since 2000-01-01 00:00:00 stored in the RTC of the GameCube/Wii. The converter produces the integer for memory dumps.

What is a Lotus 1-2-3 serial date?

Days since 1899-12-30 — the same convention Excel later adopted (hence Excel's 1900 leap bug compatibility).

How do I read a hex time?

`0x8000` = noon. Hours = (hex / 0xB60) roughly; minutes = remainder × 60/0x5DC. The converter does the exact math.

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All Format Guides

Unix Timestamp ISO 8601 ISO Week Date ISO Ordinal Date Military Time Decimal Time RFC 2822 RFC 3339 SQL Datetime Julian Date HTTP Date Excel Serial Date GPS Time UTC Time Cron Expression

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