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