USNOatomicClock

CALENDER

Select: Month . Year . Julian days Calendar days


Distance Calculator

This form uses data from the US Census and a supplementary list of cities around the world to find the latitude and longitude of two places, and then calculates the distance between them (as the crow flies). It can also provide a map showing the two places, using the Xerox PARC Map Server.

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or .


Time ConversionTime ConverterTime Zone Converter

What time is it in
 
  Sunrise & Sunset Times
(U.S. Cities or Towns)

Year:   Month:   Day:
State or Territory:
City or Town Name:
The place name you enter above must be a city or town in the U.S. Spell out place name prefixes.


NIST Network Time Servers

Name

IP Address

Location

time-a.nist.gov

129.6.15.28

NIST, Gaithersburg, Maryland

time-b.nist.gov

129.6.15.29

NIST, Gaithersburg, Maryland

time-a.timefreq.bldrdoc.gov

132.163.4.101

NIST, Boulder, Colorado

time-b.timefreq.bldrdoc.gov

132.163.4.102

NIST, Boulder, Colorado

time-c.timefreq.bldrdoc.gov

132.163.4.103

NIST, Boulder, Colorado

utcnist.colorado.edu

128.138.140.44

University of Colorado, Boulder

time.nist.gov

192.43.244.18

NCAR, Boulder, Colorado

time-nw.nist.gov

131.107.1.10

Microsoft, Redmond, Washington

nist1.datum.com

66.243.43.21

Datum, San Jose, California

nist1-dc.glassey.com

216.200.93.8

Abovenet, Virginia

nist1-ny.glassey.com

208.184.49.9

Abovenet, New York City

nist1-sj.glassey.com

207.126.98.204

Abovenet, San Jose, California

nist1.aol-ca.truetime.com

207.200.81.113

TrueTime, AOL facility, Sunnyvale, California

nist1.aol-va.truetime.com

205.188.185.33

TrueTime, AOL facility, Virginia

Other Time Servers
 
Yahoo Time Page
The Official US Time
Time Ticker
Date and Time Service
Clocks
USNO Timer Server
Horology
International standard date and time notation - ISO 8601
Internet Time
NTP cookbook
NPL
 
Introduction to NTP
NTP FAQ
Y2K statement
Information on Time and Frequency Services
Public NTP Time Servers
Miscellaneous Resources
Citations of clock sync literature
The NTP Software and Document More documents
Internetworking/NTP Research Laboratory

Bibliography on Computer Network Time Synchronization

 
 
Weather observations are always taken with respect to time. Thus all observations have a corresponding time, and that time is reported along with the measurement. By convention, weather scientists use the twenty four hour clock, and use one time zone, Greenwich Mean Time (GMT). This time is also known as Universal Time (UTC). To convert to local time, we must know the time difference between GMT and local time for both standard time and summertime (daylight savings time). Not all states use daylight savings time in the summer.
 
Standard time:
GMT
ATL
EST
CST
MST
PST
ALA
HAW
difference
-4
-5
-6
-7
-8
-9
-10
00
8P*
7P*
6P*
5P*
4P*
3P*
2P*
01
9P*
8P*
7P*
6P*
5P*
4P*
3P*
02
10P*
9P*
8P*
7P*
6P*
5P*
4P*
03
11P*
10P*
9P*
8P*
7P*
6P*
5P*
04
12A
11P*
10P*
9P*
8P*
7P*
6P*
05
1A
12A
11P*
10P*
9P*
8P*
7P*
06
2A
1A
12A
11P*
10P*
9P*
8P*
07
3A
2A
1A
12A
11P*
10P*
9P*
08
4A
3A
2A
1A
12A
11P*
10P*
09
5A
4A
3A
2A
1A
12A
11P*
10
6A
5A
4A
3A
2A
1A
12A
11
7A
6A
5A
4A
3A
2A
1A
12
8A
7A
6A
5A
4A
3A
2A
13
9A
8A
7A
6A
5A
4A
3A
14
10A
9A
8A
7A
6A
5A
4A
15
11A
10A
9A
8A
7A
6A
5A
16
12P
11A
10A
9A
8A
7A
6A
17
1P
12P
11A
10A
9A
8A
7A
18
2P
1P
12P
11A
10A
9A
8A
19
3P
2P
1P
12P
11A
10A
9A
20
4P
3P
2P
1P
12P
11A
10A
21
5P
4P
3P
2P
1P
12P
11A
22
6P
5P
4P
3P
2P
1P
12P
23
7P
6P
5P
4P
3P
2P
1P

* represents previous day

(i.e. 03 hours 23 January 93 is 8PM-MST 22 January)