Unix Rollover Checker
See Year 2038, Y2K, NTP era, GPS week, and 64-bit time limits with exact UTC dates.
Unix epoch rollovers, Year 2038, and related time limits
This reference table lists well-known time-storage overflow and rollover instants: signed and
unsigned 32-bit Unix seconds, the Year 2000 two-digit year issue, NTP era boundaries, legacy
GPS week counters, 64-bit time_t, JavaScript Date limits, and
Windows FILETIME range. Change the reference instant to see how far each event is from your
chosen date.
Why these dates matter
- 2038-01-19: Signed 32-bit
time_toverflows in many C libraries. - 2106-02-07: Unsigned 32-bit second counters stop instead of going negative.
- 2036-02-07: NTP 32-bit era rollover (seconds since 1900-01-01).
- 2038-11-21: 10-bit GPS week counter wrap (legacy receivers).
For live timestamp conversion, use the Epoch Unix Timestamp Converter or Unix Nanoseconds Converter.
Frequently Asked Questions
Is Year 2038 still a problem?
Modern servers use 64-bit time_t, but embedded devices, old binaries, and legacy schemas with 32-bit integers can still fail after the 2038 instant. This table helps you plan migrations and test fixtures.
Why are some rows approximate?
FILETIME and far-future 64-bit limits are shown with rounded calendar years because the exact human-readable date is not meaningful for engineering decisions.
Does the tool call an API?
No. All dates are computed locally from fixed constants and your reference ISO input.
Related Tools
Down Payment Calculator
Stefan Boltzmann Law Calculator
URL Decoder
Turbo Search
Image Splitter
GAD-7 Calculator
Exhaust Diameter Calculator
Creatinine Clearance Calculator
Fisher Effect Calculator
AGI Calculator
Delete List Items
Net Income Calculator
Molar Ratio Calculator
New York Overtime Calculator
Lattice Multiplication Calculator
Remove Chroma Key from Image
Hexagonal Prism Calculator
Hydraulic Conductivity Calculator
Hex to Text Converter
Slope Calculator