Date62

Compact string-based date(time) format for logging, data engineering, and visualizations.

Features

• Compact: 4 ASCII characters for date, 7 characters for datetime
• URL safe: uses Base62 encoding
• Natural sorting
• Semi-human-readable
• Dates cover range from 567-Jan-01 to 3843-Dec-31
• Arbitrary sub-second precision
• More readable shortcut form for values between 1970-Jan-01 and 2069-Dec-31
• Timezone info not supported at the moment

Use cases

• Logging timestamps
• Visualize dates on charts
• Datetime-based file identifiers
• Sub-second-precision string labels

Examples

Date or Datetime	Plain	Date62
2024-Dec-29	20241229	WeCT or 24CT
2025-Jan-01	20250101	Wf11 or 2511
2025-Jan-01 00:01:02	20250101000102	Wf11012 or 2511012

Sub-second precision

Datetime	Plain	Date62
2025-Jan-01 00:01:02.345	20250101000102345	Wf110125Z
2025-Jan-01 00:01:02.345678	20250101000102345678	25110125ZAw
2025-Jan-01 00:01:02.345678012	20250101000102345678012	25110125ZAw0C

Shortcut form

CLI Reference