⏱️ POSIX & Epoch Time Conversion
UNIX Epoch Timestamp Converter
Convert POSIX timestamps to UTC / Local ISO dates and parse human dates to epoch seconds.
Current Unix Epoch Clock (Ticking Live)
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1. Convert Epoch Timestamp → Human Date
UTC Date & Time (GMT)
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Local Browser Timezone
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ISO 8601 String
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Relative Time Offset
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2. Convert Human Date → Epoch Timestamp
Epoch Seconds
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Epoch Milliseconds
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The Mathematics of POSIX / Unix Time
Unix Time measures the exact number of seconds elapsed since 1970-01-01T00:00:00Z, excluding leap seconds.
- 1 Minute: 60 seconds
- 1 Hour: 3,600 seconds
- 1 Day: 86,400 seconds
- 1 Year (365 days): 31,536,000 seconds
The Year 2038 Problem (Y2038): On 2038-01-19 03:14:07 UTC, 32-bit signed integers reach their maximum capacity of $2^{31}-1 = 2,147,483,647$ seconds and roll over to negative numbers. All modern 64-bit architectures support timestamps up to year 292 billion.