Unix Timestamp 1249364400
seconds · 16 years ago
⚡ Quick Answer
1249364400 = Aug 4, 2009, 05:40:00 AM UTC
ISO 8601: 2009-08-04T05:40:00.000Z
Output Formats
ISO 8601
2009-08-04T05:40:00.000Z
RFC 2822
Tue, 04 Aug 2009 05:40:00 GMT
Human Readable
Tuesday, August 4, 2009 at 05:40:00 AM UTC
Unix Seconds
1249364400
Unix Milliseconds
1249364400000
Day of Week
Tuesday
Timezone Breakdown
UTC
Aug 4, 2009, 05:40:00 AM UTC
US Eastern
Aug 4, 2009, 01:40:00 AM EDT
US Pacific
Aug 3, 2009, 10:40:00 PM PDT
UK London
Aug 4, 2009, 06:40:00 AM GMT+1
Japan Tokyo
Aug 4, 2009, 02:40:00 PM GMT+9
Australia Sydney
Aug 4, 2009, 03:40:00 PM GMT+10
Related Timestamps
Frequently Asked Questions
What date is Unix timestamp 1249364400?
Unix timestamp 1249364400 represents Tuesday, August 4, 2009 at 05:40:00 AM UTC. This is 16 years ago from the current time.
Is 1249364400 in seconds or milliseconds?
1249364400 has 10 digits, which means it is in seconds. Multiply by 1,000 to get milliseconds: 1249364400000.
How do I convert 1249364400 in JavaScript?
// Normalized to Unix seconds: 1249364400 const tsSec = 1249364400; new Date(tsSec * 1000).toISOString(); // "2009-08-04T05:40:00.000Z"
How do I convert 1249364400 in Python?
import datetime
ts = 1249364400
dt = datetime.datetime.fromtimestamp(
ts, tz=datetime.timezone.utc)
print(dt.isoformat())
# "2009-08-04T05:40:00.000Z"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.