Date Add / Subtract Calculator
About Random Date Generator
The Random Date & Time Generator produces uniform random timestamps, ISO-8601 strings, UTC dates, and SQL datetime entries between any start and end date range with weekday filters and business hour constraints.
How to Use Random Date Generator
Step 1
Select Start Date and End Date range.
Step 2
Choose output format (ISO-8601, Unix Timestamp, SQL, Localized).
Step 3
Set count and optional weekday/time filters.
Step 4
Click "Generate Dates" and click "Copy Output".
Practical Use Cases for Random Date Generator
Database Mocking & Test Fixture Date Population
Generate realistic creation dates, transaction timestamps, and birthdates within bounded calendar ranges for development fixtures.
Simulated Schedule & Appointment Sampling
Synthesize random appointment times restricted strictly to business days (Monday-Friday) and working hours (09:00 - 17:00).
Input & Output Examples
Generating Random Dates between Jan 1, 2026 and Dec 31, 2026
Range: `2026-01-01` to `2026-12-31`, Format: `ISO-8601`, Count: `3`
Dates: `["2026-04-12T08:32:15Z", "2026-08-23T14:19:04Z", "2026-11-05T19:45:51Z"]`
Key Features & Performance
- ✓Bounded Calendar Range: select start date/time and end date/time with interactive calendar pickers.
- ✓Business Day & Hour Filters: option to exclude weekends and restrict generated times to working hours.
- ✓Export Formats: ISO-8601, RFC-2822, Unix Epoch (ms/s), SQL `DATETIME`, and human localized dates.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy date list or JSON array.
Key Terminology & Definitions
ISO-8601 Date Format
An international standard for date and time representation formatted as `YYYY-MM-DDTHH:MM:SSZ`.
Epoch Interpolation
Generating random dates by selecting a uniform random integer between the Unix timestamp milliseconds of the start and end dates.