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The Sky Tonight® ©1981-2008 Stephen E. Hutson, All Rights Reserved Worldwide |
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The Sky Tonight® ©1981-2008 Stephen E. Hutson, All Rights Reserved Worldwide |
Universal Time
Central Time is always given on The Sky Tonight®, but those who deal with wide geographical areas use Universal Time instead. Universal Time is a worldwide time system, independent of the time zone system. Since many celestial events occur independent of local time, Universal Time is used by astronomers of all nations.
The below charts allow rapid conversion between Universal Time and your local or daylight time.
Universal Time Conversion Charts are offered for the following time zones/systems:
Converting from/to Eastern Daylight Time:
| Universal Time | E.D.T. |
|---|---|
|
00 H |
8 P.M. (- one day)
|
|
01 H
|
9 P.M. (- one day)
|
|
02 H
|
10 P.M. (- one day)
|
|
03 H
|
11 P.M. (- one day)
|
|
04 H
|
12 A.M.
|
|
05 H
|
1 A.M.
|
|
06 H
|
2 A.M.
|
|
07 H
|
3 A.M.
|
|
08 H
|
4 A.M.
|
|
09 H
|
5 A.M.
|
|
10 H
|
6 A.M.
|
|
11 H
|
7 A.M.
|
|
12 H
|
8 A.M.
|
|
13 H
|
9 A.M.
|
|
14 H
|
10 A.M.
|
|
15 H
|
11 A.M.
|
|
16 H
|
12 P.M.
|
|
17 H
|
1 P.M.
|
|
18 H
|
2 P.M.
|
|
19 H
|
3 P.M.
|
|
20 H
|
4 P.M.
|
|
21 H
|
5 P.M.
|
|
22 H
|
6 P.M.
|
|
23 H
|
7 P.M.
|
Select a Time Zone / Top of Page
Converting from/to Eastern Standard Time / Central Daylight Time:
| Universal Time | E.S.T. / C.D.T. |
|---|---|
|
00 H
|
7 P.M. (- one day)
|
|
01 H
|
8 P.M. (- one day)
|
|
02 H
|
9 P.M. (- one day)
|
|
03 H
|
10 P.M. (- one day)
|
|
04 H
|
11 P.M. (- one day)
|
|
05 H
|
12 A.M.
|
|
06 H
|
1 A.M.
|
|
07 H
|
2 A.M.
|
|
08 H
|
3 A.M.
|
|
09 H
|
4 A.M.
|
|
10 H
|
5 A.M.
|
|
11 H
|
6 A.M.
|
|
12 H
|
7 A.M.
|
|
13 H
|
8 A.M.
|
|
14 H
|
9 A.M.
|
|
15 H
|
10 A.M.
|
|
16 H
|
11 A.M.
|
|
17 H
|
12 P.M.
|
|
18 H
|
1 P.M.
|
|
19 H
|
2 P.M.
|
|
20 H
|
3 P.M.
|
|
21 H
|
4 P.M.
|
|
22 H
|
5 P.M.
|
|
23 H
|
6 P.M.
|
Select a Time Zone / Top of Page
Converting from/to Central Standard Time / Mountain Daylight Time:
| Universal Time | C.S.T. / M.D.T. |
|---|---|
|
00 H
|
6 P.M. (- one day)
|
|
01 H
|
7 P.M. (- one day)
|
|
02 H
|
8 P.M. (- one day)
|
|
03 H
|
9 P.M. (- one day)
|
|
04 H
|
10 P.M. (- one day)
|
|
05 H
|
11 P.M. (- one day)
|
|
06 H
|
12 A.M.
|
|
07 H
|
1 A.M.
|
|
08 H
|
2 A.M.
|
|
09 H
|
3 A.M.
|
|
10 H
|
4 A.M.
|
|
11 H
|
5 A.M.
|
|
12 H
|
6 A.M.
|
|
13 H
|
7 A.M.
|
|
14 H
|
8 A.M.
|
|
15 H
|
9 A.M.
|
|
16 H
|
10 A.M.
|
|
17 H
|
11 A.M.
|
|
18 H
|
12 P.M.
|
|
19 H
|
1 P.M.
|
|
20 H
|
2 P.M.
|
|
21 H
|
3 P.M.
|
|
22 H
|
4 P.M.
|
|
23 H
|
5 P.M.
|
Select a Time Zone / Top of Page
Converting from/to Mountain Standard Time / Pacific Daylight Time:
| Universal Time | M.S.T. / P.D.T. |
|---|---|
|
00 H
|
5 P.M. (- one day)
|
|
01 H
|
6 P.M. (- one day)
|
|
02 H
|
7 P.M. (- one day)
|
|
03 H
|
8 P.M. (- one day)
|
|
04 H
|
9 P.M. (- one day)
|
|
05 H
|
10 P.M. (- one day)
|
|
06 H
|
11 P.M. (- one day)
|
|
07 H
|
12 A.M.
|
|
08 H
|
1 A.M.
|
|
09 H
|
2 A.M.
|
|
10 H
|
3 A.M.
|
|
11 H
|
4 A.M.
|
|
12 H
|
5 A.M.
|
|
13 H
|
6 A.M.
|
|
14 H
|
7 A.M.
|
|
15 H
|
8 A.M.
|
|
16 H
|
9 A.M.
|
|
17 H
|
10 A.M.
|
|
18 H
|
11 A.M.
|
|
19 H
|
12 P.M.
|
|
20 H
|
1 P.M.
|
|
21 H
|
2 P.M.
|
|
22 H
|
3 P.M.
|
|
23 H
|
4 P.M.
|
Select a Time Zone / Top of Page
Converting from/to Pacific Standard Time:
| Universal Time | P.S.T. |
|---|---|
|
00 H
|
4 P.M. (- one day)
|
|
01 H
|
5 P.M. (- one day)
|
|
02 H
|
6 P.M. (- one day)
|
|
03 H
|
7 P.M. (- one day)
|
|
04 H
|
8 P.M. (- one day)
|
|
05 H
|
9 P.M. (- one day)
|
|
06 H
|
10 P.M. (- one day)
|
|
07 H
|
11 P.M. (- one day)
|
|
08 H
|
12 A.M.
|
|
09 H
|
1 A.M.
|
|
10 H
|
2 A.M.
|
|
11 H
|
3 A.M.
|
|
12 H
|
4 A.M.
|
|
13 H
|
5 A.M.
|
|
14 H
|
6 A.M.
|
|
15 H
|
7 A.M.
|
|
16 H
|
8 A.M.
|
|
17 H
|
9 A.M.
|
|
18 H
|
10 A.M.
|
|
19 H
|
11 A.M.
|
|
20 H
|
12 P.M.
|
|
21 H
|
1 P.M.
|
|
22 H
|
2 P.M.
|
|
23 H
|
3 P.M.
|
Select a Time Zone / Top of Page
Correcting for Universal Time “Day Change”
The Standard or Daylight Time flagged by “(- one day)” precedes the listed Universal Time by precisely one day.
For example: