Table of Mean Value of the Equation
of Time, in Minutes (at true Noon)
To correct Solar Time for Standard Time:
Add Equation of Time when Sun "slow," i.e., sign is positive (+); subtract
when Sun "fast," i.e., sign is negative (-).
| Day |
JAN |
FEB |
MAR |
APR |
MAY |
JUN |
JUL |
AUG |
SEP |
OCT |
NOV |
DEC |
| 1 |
+3.4 |
+13.6 |
+12.5 |
+4.1 |
-2.8 |
-2.3 |
+3.6 |
+6.3 |
+0.2 |
-10.1 |
-16.3 |
-11.2 |
| 2 |
3.9 |
13.7 |
12.3 |
3.8 |
3.0 |
2.2 |
3.8 |
6.2 |
0.1 |
10.4 |
16.4 |
10.8 |
| 3 |
4.3 |
13.8 |
12.1 |
3.5 |
3.1 |
2.0 |
4.0 |
6.2 |
0.5 |
10.8 |
16.4 |
10.4 |
| 4 |
4.8 |
13.9 |
11.9 |
3.2 |
3.2 |
1.9 |
4.2 |
6.1 |
0.7 |
11.1 |
16.4 |
10.0 |
| 5 |
5.2 |
14.0 |
11.7 |
2.9 |
3.3 |
1.7 |
4.4 |
6.0 |
1.1 |
11.4 |
16.4 |
9.6 |
| 6 |
5.7 |
14.1 |
11.5 |
2.6 |
3.4 |
1.5 |
4.6 |
5.9 |
1.5 |
11.7 |
16.3 |
9.2 |
| 7 |
+6.1 |
+14.2 |
+11.2 |
+2.3 |
-3.4 |
-1.3 |
+4.7 |
+5.8 |
-1.8 |
-12.0 |
-16.3 |
-8.8 |
| 8 |
6.5 |
14.2 |
11.0 |
2.1 |
3.5 |
1.2 |
4.9 |
5.7 |
2.1 |
12.3 |
16.3 |
8.3 |
| 9 |
6.9 |
14.3 |
10.7 |
1.8 |
3.6 |
1.0 |
5.0 |
5.5 |
2.5 |
12.6 |
16.2 |
7.9 |
| 10 |
7.3 |
14.3 |
10.5 |
1.5 |
3.6 |
0.8 |
5.2 |
5.4 |
2.8 |
12.8 |
16.1 |
7.5 |
| Day |
JAN |
FEB |
MAR |
APR |
MAY |
JUN |
JUL |
AUG |
SEP |
OCT |
NOV |
DEC |
| 11 |
7.8 |
14.3 |
10.2 |
1.2 |
3.7 |
0.6 |
5.3 |
5.2 |
3.2 |
13.1 |
16.0 |
7.0 |
| 12 |
8.2 |
14.3 |
10.0 |
0.9 |
3.7 |
0.4 |
5.4 |
5.1 |
3.5 |
13.4 |
15.9 |
6.5 |
| 13 |
+8.5 |
+14.3 |
+9.7 |
+0.7 |
-3.7 |
-0.2 |
+5.6 |
+4.9 |
-3.9 |
-13.6 |
-15.8 |
-6.1 |
| 14 |
8.9 |
14.3 |
9.4 |
0.4 |
3.7 |
0.0 |
5.7 |
4.7 |
4.2 |
13.8 |
15.6 |
5.6 |
| 15 |
9.3 |
14.2 |
9.1 |
+0.2 |
3.7 |
+0.2 |
5.8 |
4.5 |
4.6 |
14.1 |
15.5 |
5.1 |
| 16 |
9.6 |
14.2 |
8.9 |
-0.1 |
3.7 |
0.4 |
5.9 |
4.3 |
5.0 |
14.3 |
15.3 |
4.6 |
| 17 |
9.9 |
14.1 |
8.6 |
0.2 |
3.7 |
0.7 |
6.0 |
4.1 |
5.3 |
14.5 |
15.1 |
4.1 |
| 18 |
10.3 |
14.0 |
8.3 |
0.5 |
3.7 |
0.9 |
6.1 |
3.9 |
5.5 |
14.7 |
14.9 |
3.6 |
| 19 |
+10.6 |
+13.9 |
+8.0 |
-0.7 |
-3.6 |
+1.1 |
+6.2 |
+3.7 |
-6.0 |
-14.9 |
-14.7 |
-3.2 |
| 20 |
10.9 |
13.8 |
7.7 |
0.9 |
3.6 |
1.3 |
6.2 |
3.5 |
6.4 |
15.1 |
14.5 |
2.7 |
| Day |
JAN |
FEB |
MAR |
APR |
MAY |
JUN |
JUL |
AUG |
SEP |
OCT |
NOV |
DEC |
| 21 |
11.2 |
13.7 |
7.4 |
1.2 |
3.5 |
1.5 |
6.3 |
3.2 |
6.7 |
15.2 |
14.3 |
2.2 |
| 22 |
11.5 |
13.6 |
7.1 |
1.4 |
3.5 |
1.7 |
6.3 |
3.0 |
7.1 |
15.4 |
14.0 |
1.7 |
| 23 |
11.8 |
13.5 |
6.8 |
1.6 |
3.4 |
2.0 |
6.4 |
2.8 |
7.4 |
15.6 |
13.7 |
1.2 |
| 24 |
12.0 |
13.4 |
6.5 |
1.8 |
3.3 |
2.2 |
6.4 |
2.5 |
7.8 |
15.7 |
13.4 |
0.7 |
| 25 |
+12.3 |
+13.2 |
+6.2 |
-1.9 |
-3.2 |
+2.4 |
+6.4 |
+2.2 |
-8.1 |
-15.8 |
-13.1 |
-0.2 |
| 26 |
12.5 |
13.1 |
5.9 |
2.1 |
3.1 |
2.6 |
6.4 |
1.9 |
8.4 |
15.9 |
12.9 |
0.3 |
| 27 |
12.7 |
12.9 |
5.6 |
2.3 |
3.0 |
2.8 |
6.4 |
1.7 |
8.8 |
16.0 |
12.5 |
0.8 |
| 28 |
12.9 |
12.7 |
5.3 |
2.4 |
2.9 |
3.0 |
6.4 |
1.4 |
9.1 |
16.1 |
12.2 |
1.3 |
| 29 |
13.1 |
|
5.0 |
2.6 |
2.8 |
3.2 |
6.4 |
1.1 |
9.5 |
16.2 |
11.9 |
1.8 |
| 30 |
13.3 |
|
4.7 |
2.7 |
2.6 |
3.4 |
6.4 |
0.8 |
9.8 |
16.3 |
11.5 |
2.3 |
| 31 |
+13.4 |
|
+4.4 |
|
-2.5 |
|
+6.3 |
+0.5 |
|
-16.3 |
|
+2.8 |