Julian Date Today, Converter and Calendar (Day of the Year)

Julian date calendar 2026

Find the day of the month on the left and read across to the month. 2026 is not a leap year: March 1 is day 060 and December 31 is day 365.

Day of the year for each date, January to June 2026
Day	Jan	Feb	Mar	Apr	May	Jun
1	001	032	060	091	121	152
2	002	033	061	092	122	153
3	003	034	062	093	123	154
4	004	035	063	094	124	155
5	005	036	064	095	125	156
6	006	037	065	096	126	157
7	007	038	066	097	127	158
8	008	039	067	098	128	159
9	009	040	068	099	129	160
10	010	041	069	100	130	161
11	011	042	070	101	131	162
12	012	043	071	102	132	163
13	013	044	072	103	133	164
14	014	045	073	104	134	165
15	015	046	074	105	135	166
16	016	047	075	106	136	167
17	017	048	076	107	137	168
18	018	049	077	108	138	169
19	019	050	078	109	139	170
20	020	051	079	110	140	171
21	021	052	080	111	141	172
22	022	053	081	112	142	173
23	023	054	082	113	143	174
24	024	055	083	114	144	175
25	025	056	084	115	145	176
26	026	057	085	116	146	177
27	027	058	086	117	147	178
28	028	059	087	118	148	179
29	029		088	119	149	180
30	030		089	120	150	181
31	031		090		151

Day of the year for each date, July to December 2026
Day	Jul	Aug	Sep	Oct	Nov	Dec
1	182	213	244	274	305	335
2	183	214	245	275	306	336
3	184	215	246	276	307	337
4	185	216	247	277	308	338
5	186	217	248	278	309	339
6	187	218	249	279	310	340
7	188	219	250	280	311	341
8	189	220	251	281	312	342
9	190	221	252	282	313	343
10	191	222	253	283	314	344
11	192	223	254	284	315	345
12	193	224	255	285	316	346
13	194	225	256	286	317	347
14	195	226	257	287	318	348
15	196	227	258	288	319	349
16	197	228	259	289	320	350
17	198	229	260	290	321	351
18	199	230	261	291	322	352
19	200	231	262	292	323	353
20	201	232	263	293	324	354
21	202	233	264	294	325	355
22	203	234	265	295	326	356
23	204	235	266	296	327	357
24	205	236	267	297	328	358
25	206	237	268	298	329	359
26	207	238	269	299	330	360
27	208	239	270	300	331	361
28	209	240	271	301	332	362
29	210	241	272	302	333	363
30	211	242	273	303	334	364
31	212	243		304		365

Pick a date in another year above and the chart follows it. The same day numbers are on NOAA's Day-Of-Year Calendar.

What the number means

In everyday use, a Julian date is the day of the year: January 1 is 001 and December 31 is 365, or 366 in a leap year. It is printed as three digits, or with the year in front: 26315 is day 315 of 2026, and 2026315 is the same day with the full year. Some forms keep only the last digit of the year, so the same day reads 6315.

The official sources use plainer names for it. NOAA's Global Monitoring Laboratory publishes a "Day-Of-Year Calendar". The U.S. Department of Agriculture prints it on graded egg cartons: "The lot number is the consecutive day of the year in which the eggs were packed into the carton, and consists of three digits, such as 042, 155, 267, etc." and "eggs packed into the container on January 1st would be listed as 001."

The Julian date in a military document number

Every military supply requisition carries a 14-character document number, and four of those characters are this date. The Defense Logistics Agency's manual (DLM 4000.25, Volume 2, Appendix 7.7) builds the number from the activity address code, a "four-position ordinal date" and a serial number, and defines the date in two lines: the first position "will indicate the last numeric digit of the calendar year in which the document was originated," and the next three "will indicate the numerical or consecutive day of the calendar year; for example, 035 is equal to February 4th."

The manual's own examples
Date in the document number	Calendar date
0005	January 5, 2010
9052	February 21, 2009
2279	October 5, 2012

The manual calls it an ordinal date; it is the same number this page calls the Julian date, with one digit of year in front. With one digit for the year, the same four characters come around every ten years, so the box above reads a four-digit code as the most recent year ending in that digit. Today's date in this form is the "Four digits (YDDD)" figure in the result.

The astronomers' Julian date is a different number

The U.S. Naval Observatory defines it this way: "Julian dates (abbreviated JD) are simply a continuous count of days and fractions since noon Universal Time on January 1, 4713 BC (on the Julian calendar)." Because the count starts at noon, midnight Universal Time always ends in .5; in the Observatory's words, "0h UT1 corresponds to a Julian date fraction of 0.5." The fourth figure in the result above is that number for the date you picked.

The leap-year rule both numbers depend on is the Gregorian calendar's, which the same page states: "a leap year every fourth year except century years not exactly divisible by 400." So 2028 has a day 366 and 2100 will not.

How to work it out by hand

Add the days of the months that have fully passed, then the day of the month. For November 11 in a regular year: 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 = 304 days through October, plus 11, is day 315. In a leap year every date from March 1 on is one higher. Going the other way, subtract whole months until what is left fits inside a month: day 100 minus January (31), February (28) and March (31) leaves 10, so it is April 10.

Dates written this way sort in order and make the days between two dates a subtraction. For time on the same forms, see the military time converter.

Julian date — frequently asked questions

What is a Julian date?

In everyday use it is the day of the year: January 1 is 001 and December 31 is 365, or 366 in a leap year. NOAA publishes it as a "Day-Of-Year Calendar" and USDA calls it "the consecutive day of the year." Astronomers use the same name for a different number: the U.S. Naval Observatory defines Julian dates as "a continuous count of days and fractions since noon Universal Time on January 1, 4713 BC (on the Julian calendar)."

How do I read a five-digit Julian date?

The first two digits are the year and the last three are the day of the year. 26315 is day 315 of 2026, which is November 11, 2026. A seven-digit code carries the full year the same way: 2026315.

How do I convert a date to a Julian date?

Add the days of the months that have fully passed, then the day of the month. November 11 in a regular year is 304 days through October plus 11, so day 315. In a leap year every date from March 1 on is one higher: November 11 is day 316.

What is the Julian date in a military document number?

Four characters: one digit of year and the day of the year. DLM 4000.25, Volume 2, Appendix 7.7 calls it a "four-position ordinal date": the first position "will indicate the last numeric digit of the calendar year in which the document was originated," and the next three "the numerical or consecutive day of the calendar year; for example, 035 is equal to February 4th." Its examples: 0005 is January 5, 2010, 9052 is February 21, 2009 and 2279 is October 5, 2012.

What Julian date is day 60?

In a regular year day 060 is March 1. In a leap year day 060 is February 29 and March 1 is day 061.

How many days are in a Julian date calendar?

365 in a regular year and 366 in a leap year. The Naval Observatory states the Gregorian rule: "a leap year every fourth year except century years not exactly divisible by 400." So 2028 is a leap year and 2100 is not.

What is the Julian date on an egg carton?

The three-digit pack date. USDA's Agricultural Marketing Service: "The lot number is the consecutive day of the year in which the eggs were packed into the carton, and consists of three digits, such as 042, 155, 267, etc. Since the lot number represents the consecutive day of the year, eggs packed into the container on January 1st would be listed as 001."

Why does the astronomers' Julian date end in .5?

Because that count starts at noon. The Naval Observatory: "0h UT1 corresponds to a Julian date fraction of 0.5." January 1, 2000 at 0h Universal Time is Julian date 2451544.5, and noon that day is 2451545.0.

Day	Jan	Feb	Mar	Apr	May	Jun
1	001	032	060	091	121	152
2	002	033	061	092	122	153
3	003	034	062	093	123	154
4	004	035	063	094	124	155
5	005	036	064	095	125	156
6	006	037	065	096	126	157
7	007	038	066	097	127	158
8	008	039	067	098	128	159
9	009	040	068	099	129	160
10	010	041	069	100	130	161
11	011	042	070	101	131	162
12	012	043	071	102	132	163
13	013	044	072	103	133	164
14	014	045	073	104	134	165
15	015	046	074	105	135	166
16	016	047	075	106	136	167
17	017	048	076	107	137	168
18	018	049	077	108	138	169
19	019	050	078	109	139	170
20	020	051	079	110	140	171
21	021	052	080	111	141	172
22	022	053	081	112	142	173
23	023	054	082	113	143	174
24	024	055	083	114	144	175
25	025	056	084	115	145	176
26	026	057	085	116	146	177
27	027	058	086	117	147	178
28	028	059	087	118	148	179
29	029		088	119	149	180
30	030		089	120	150	181
31	031		090		151

Day	Jul	Aug	Sep	Oct	Nov	Dec
1	182	213	244	274	305	335
2	183	214	245	275	306	336
3	184	215	246	276	307	337
4	185	216	247	277	308	338
5	186	217	248	278	309	339
6	187	218	249	279	310	340
7	188	219	250	280	311	341
8	189	220	251	281	312	342
9	190	221	252	282	313	343
10	191	222	253	283	314	344
11	192	223	254	284	315	345
12	193	224	255	285	316	346
13	194	225	256	286	317	347
14	195	226	257	287	318	348
15	196	227	258	288	319	349
16	197	228	259	289	320	350
17	198	229	260	290	321	351
18	199	230	261	291	322	352
19	200	231	262	292	323	353
20	201	232	263	293	324	354
21	202	233	264	294	325	355
22	203	234	265	295	326	356
23	204	235	266	296	327	357
24	205	236	267	297	328	358
25	206	237	268	298	329	359
26	207	238	269	299	330	360
27	208	239	270	300	331	361
28	209	240	271	301	332	362
29	210	241	272	302	333	363
30	211	242	273	303	334	364
31	212	243		304		365

Day	Jan	Feb	Mar	Apr	May	Jun
1	001	032	060	091	121	152
2	002	033	061	092	122	153
3	003	034	062	093	123	154
4	004	035	063	094	124	155
5	005	036	064	095	125	156
6	006	037	065	096	126	157
7	007	038	066	097	127	158
8	008	039	067	098	128	159
9	009	040	068	099	129	160
10	010	041	069	100	130	161
11	011	042	070	101	131	162
12	012	043	071	102	132	163
13	013	044	072	103	133	164
14	014	045	073	104	134	165
15	015	046	074	105	135	166
16	016	047	075	106	136	167
17	017	048	076	107	137	168
18	018	049	077	108	138	169
19	019	050	078	109	139	170
20	020	051	079	110	140	171
21	021	052	080	111	141	172
22	022	053	081	112	142	173
23	023	054	082	113	143	174
24	024	055	083	114	144	175
25	025	056	084	115	145	176
26	026	057	085	116	146	177
27	027	058	086	117	147	178
28	028	059	087	118	148	179
29	029		088	119	149	180
30	030		089	120	150	181
31	031		090		151

Day	Jul	Aug	Sep	Oct	Nov	Dec
1	182	213	244	274	305	335
2	183	214	245	275	306	336
3	184	215	246	276	307	337
4	185	216	247	277	308	338
5	186	217	248	278	309	339
6	187	218	249	279	310	340
7	188	219	250	280	311	341
8	189	220	251	281	312	342
9	190	221	252	282	313	343
10	191	222	253	283	314	344
11	192	223	254	284	315	345
12	193	224	255	285	316	346
13	194	225	256	286	317	347
14	195	226	257	287	318	348
15	196	227	258	288	319	349
16	197	228	259	289	320	350
17	198	229	260	290	321	351
18	199	230	261	291	322	352
19	200	231	262	292	323	353
20	201	232	263	293	324	354
21	202	233	264	294	325	355
22	203	234	265	295	326	356
23	204	235	266	296	327	357
24	205	236	267	297	328	358
25	206	237	268	298	329	359
26	207	238	269	299	330	360
27	208	239	270	300	331	361
28	209	240	271	301	332	362
29	210	241	272	302	333	363
30	211	242	273	303	334	364
31	212	243		304		365

Julian Date