THE EQUATION OF TIME
The Equation of Time is the variation in time shown by our clocks, and that shown on our sundials.
A sundial can be up to 16 minutes and 23 second fast, and 14 minutes 20 seconds slow.
The table shows the variation for each day of the year.
DayJanFebMarAprMayJuneJulyAugSeptOctNovDec
---slowslowslowslowfastfastslowslowslowfastfastfast
13m12s13m33s12m34s4m08s2m51s2m25s3m33s6m16s0m12s10m05s16m20s11m11s
23:4013:4112:233:502:592:163:456:130:0710:2416:2210:49
34:0813:4812:113:323:062:063:576:090:2610:4316:2310:26
44:3613:5511:583:143:121:564:086:040:4511:0216:2310:02
55:0314:0111:452:573:181:464:195:591:0511:2016:229:38
---slowslowslowslowfastfastslowslowfastfastfastfast
65:3014:0611:312:403:231:364:295:531:2511:3816:209:13
75:5714:1011:172:233:271:254:395:461:4511:5616:188:48
86:2314:1411:032:063:311:144:495:392:0512:1316:158:22
96:4914:1610:481:493:351:034:585:312:2612:3016:117:56
107:1414:1810:331:323:380:515:075:232:4712:4616:067:29
DayJanFebMarAprMayJuneJulyAugSeptOctNovDec
---slowslowslowslowfastfastslowslowfastfastfastfast
117:384:1910:181:163:400:395:165:143:0813:0216:007:02
128:0214:2010:021:003:420:275:245:053:2913:1815:536:34
138:2514:199:460:443:440:155:324:553:5013:3315:466:06
148:4814:189:300:293:440:035:394:444:1113:4715:375:38
159:1014:169:130:143:440:105:464:334:3214:0115:285:09
---slowslowslowfastfastslowslowslowfastfastfastfast
169:3214:138:560:013:440:235:524:214:5314:1415:184:40
179:5214:108:390:153:430:365:584:095:1414:2715:074:11
1810:1214:068:220:293:410:496:033:575:3514:3914:563:42
1910:3214:018:040:433:391:026:083:445:5614:5114:433:13
2010:5013:557:460:563:371:156:123:306:1815:0214:302:43
DayJanFebMarAprMayJuneJulyAugSeptOctNovDec
---slowslowslowfastfastslowslowslowfastfastfastfast
2111:0813:497:281:003:341:286:153:166:4015:1214:162:13
2211:2513:427:101:213:301:416:183:017:0115:2214:011:43
2311:4113:356:521:333:241:546:202:467:2215:3113:451:13
2411:5713:276:341:453:212:076:222:307:4315:4013:280:43
2512:1213:186:161:563:162:206:242:148:0415:4713:110:13
---slowslowslowfastfastslowslowslowfastfastfastslow
2612:2613:095:582:063:102:336:251:588:2515:5412:530:17
2712:3912:595:402:163:032:456:251:418:4616:0112:340:47
2812:5112:485:212:262:562:576:241:249:0616:0612:141:16
2913:0312:425:022:352:493:096:231:079:2616:1111:541:45
3013:14----4:442:432:413:216:210:499:4616:1511:332:14
3113:24----4:26----2:33----6:190:31----16:18----2:43