Unix Timestamp 684988800
seconds · 34 years ago
⚡ Quick Answer
684988800 = Sep 16, 1991, 02:40:00 AM UTC
ISO 8601: 1991-09-16T02:40:00.000Z
Output Formats
ISO 8601
1991-09-16T02:40:00.000Z
RFC 2822
Mon, 16 Sep 1991 02:40:00 GMT
Human Readable
Monday, September 16, 1991 at 02:40:00 AM UTC
Unix Seconds
684988800
Unix Milliseconds
684988800000
Day of Week
Monday
Timezone Breakdown
UTC
Sep 16, 1991, 02:40:00 AM UTC
US Eastern
Sep 15, 1991, 10:40:00 PM EDT
US Pacific
Sep 15, 1991, 07:40:00 PM PDT
UK London
Sep 16, 1991, 03:40:00 AM GMT+1
Japan Tokyo
Sep 16, 1991, 11:40:00 AM GMT+9
Australia Sydney
Sep 16, 1991, 12:40:00 PM GMT+10
Related Timestamps
Frequently Asked Questions
What date is Unix timestamp 684988800?
Unix timestamp 684988800 represents Monday, September 16, 1991 at 02:40:00 AM UTC. This is 34 years ago from the current time.
Is 684988800 in seconds or milliseconds?
684988800 has 9 digits, which means it is in seconds. Multiply by 1,000 to get milliseconds: 684988800000.
How do I convert 684988800 in JavaScript?
// Normalized to Unix seconds: 684988800 const tsSec = 684988800; new Date(tsSec * 1000).toISOString(); // "1991-09-16T02:40:00.000Z"
How do I convert 684988800 in Python?
import datetime
ts = 684988800
dt = datetime.datetime.fromtimestamp(
ts, tz=datetime.timezone.utc)
print(dt.isoformat())
# "1991-09-16T02:40:00.000Z"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.