Unix Timestamp Boundary Checker
Unix timestamp boundary checker for 32-bit and 64-bit limits with Y2K38 checkpoints, for debugging, migration, and log validation scenarios.
Timestamp Boundaries
32-bit Signed Integer Range
Min
-2147483648
Max
2147483647
Date
1901-12-13 20:45:52 UTC ~ 2038-01-19 03:14:07 UTC
32-bit Unsigned Integer Range
Min
0
Max
4294967295
Date
1970-01-01 00:00:00 UTC ~ 2106-02-07 06:28:15 UTC
JavaScript Number Range
Safe Integer
±9007199254740991
Date
Approx. year -271821 to 275760
64-bit Integer Range
Max Milliseconds
9223372036854775807
Date
Approx. year 292278994
Special Date Timestamps
Unix Epoch
1970-01-01 00:00:00 UTC
Seconds: 0
Milliseconds: 0
Y2K38 Issue
2038-01-19 03:14:07 UTC
Seconds: 2147483647
32-bit overflow
Y2K
2000-01-01 00:00:00 UTC
Seconds: 946684800
Common Time Points
Unix Timestamp Boundary Guide
Unix timestamp boundary checker helps verify representable ranges across integer widths and is useful for overflow diagnosis, cross-language compatibility checks, and API boundary validation.
Core Features
- Shows 32-bit signed, 32-bit unsigned, JavaScript Number, and 64-bit timestamp boundaries.
- Includes key reference points such as Unix Epoch, Y2K38, and Y2K timestamps.
- Shows boundary moments in UTC for consistent cross-system validation.
- Displays real-time current Unix timestamp in seconds.
Use Cases
- Backend timestamp field design and boundary validation.
- Time type compatibility checks during database migration.
- Y2K38 risk assessment for legacy system modernization.
- Cross-platform log timestamp comparison and incident diagnosis.
Boundary Notes
- The 32-bit signed upper limit is 2147483647 seconds, equal to 2038-01-19 03:14:07 UTC.
- The 32-bit unsigned upper limit is 4294967295 seconds, equal to 2106-02-07 06:28:15 UTC.
- JavaScript Date supports an effective range around year -271821 to 275760.