Unix Timestamp 315511200
seconds · 46 years ago
⚡ Quick Answer
315511200 = Dec 31, 1979, 06:00:00 PM UTC
ISO 8601: 1979-12-31T18:00:00.000Z
Output Formats
ISO 8601
1979-12-31T18:00:00.000Z
RFC 2822
Mon, 31 Dec 1979 18:00:00 GMT
Human Readable
Monday, December 31, 1979 at 06:00:00 PM UTC
Unix Seconds
315511200
Unix Milliseconds
315511200000
Day of Week
Monday
Timezone Breakdown
UTC
Dec 31, 1979, 06:00:00 PM UTC
US Eastern
Dec 31, 1979, 01:00:00 PM EST
US Pacific
Dec 31, 1979, 10:00:00 AM PST
UK London
Dec 31, 1979, 06:00:00 PM GMT
Japan Tokyo
Jan 1, 1980, 03:00:00 AM GMT+9
Australia Sydney
Jan 1, 1980, 05:00:00 AM GMT+11
Related Timestamps
Frequently Asked Questions
What date is Unix timestamp 315511200?
Unix timestamp 315511200 represents Monday, December 31, 1979 at 06:00:00 PM UTC. This is 46 years ago from the current time.
Is 315511200 in seconds or milliseconds?
315511200 has 9 digits, which means it is in seconds. Multiply by 1,000 to get milliseconds: 315511200000.
How do I convert 315511200 in JavaScript?
// Normalized to Unix seconds: 315511200 const tsSec = 315511200; new Date(tsSec * 1000).toISOString(); // "1979-12-31T18:00:00.000Z"
How do I convert 315511200 in Python?
import datetime
ts = 315511200
dt = datetime.datetime.fromtimestamp(
ts, tz=datetime.timezone.utc)
print(dt.isoformat())
# "1979-12-31T18:00:00.000Z"What is the Unix timestamp for right now?
Use our live timestamp converter to get the current Unix timestamp. In JavaScript: Math.floor(Date.now() / 1000). In Python: int(time.time()). In bash: date +%s.
Need to convert a different timestamp?
Our full converter supports seconds, milliseconds, microseconds, 25+ timezones, and auto-detection.
Open Full Converter →Related Guides & Tutorials
// developers also readComplete Guide to Unix Timestamp Precision in 2026
The definitive guide to Unix timestamp precision, formats, and edge cases in production.
Unix Timestamps in JavaScript
Date.now(), the Temporal API, and timezone-aware timestamp handling in JavaScript.
Session Management with Timestamp Expiration
JWT expiration, session timeouts, and token refresh using Unix timestamps.