| July 3 | Armenian | Other calendars Armenian 18 Hrotich 1475 Aztec Tepeilhuitl 14, 6 Ehēcatl Babylonian 17 Simanu, 2337 SE Balinese pawukon Luang, Pepet, Kajeng, Menala, Umanis, Maulu, Sukra of Lan… | 1.00 | infobox |
| July 3 | Armenian | 18 Hrotich 1475 | 1.00 | infobox |
| July 3 | Aztec | Tepeilhuitl 14, 6 Ehēcatl | 1.00 | infobox |
| July 3 | Babylonian | 17 Simanu, 2337 SE | 1.00 | infobox |
| July 3 | Balinese pawukon | Luang, Pepet, Kajeng, Menala, Umanis, Maulu, Sukra of Langkir, Uma, Erangan, Pati | 1.00 | infobox |
| July 3 | Bengali | 19 Asharh, BS 1433 | 1.00 | infobox |
| July 3 | Chinese | Yang Earth Tiger・Ox Mansion 19 Wǔyuè, Bǐngwǔnián (Xiazhi, 4 days until Xiaoshu) | 1.00 | infobox |
| July 3 | Common Era | 3 July 2026 CE | 1.00 | infobox |
| July 3 | Coptic | 26 Paoni, AM 1742 | 1.00 | infobox |
| July 3 | Egyptian | 18 Athyr, 2775 NE | 1.00 | infobox |
| July 3 | Ethiopian | 26 Sanē, 2018 Amätä Məhrät | 1.00 | infobox |
| July 3 | French Republican | Décade II, Quintidi de Messidor de l'Année 234 de la République | 1.00 | infobox |
| July 3 | Gregorian | 3 July, AD 2026 | 1.00 | infobox |
| July 3 | Hebrew | 18 Tammuz, AM 5786 | 1.00 | infobox |
| July 3 | Hindu | 5127 KY・1,872,759・Rāudra Solar: 19 Āṣāḍha, 1948 SE Lunisolar: Tr̥tīyā, Kṛishna pakṣa of Jyeṣṭha, 2083 VE | 1.00 | infobox |
| July 3 | Icelandic | Föstudagur, 12 Sólmánuður 2026 | 1.00 | infobox |
| July 3 | Islamic | 17 Muharram, AH 1448 (using tabular method) | 1.00 | infobox |
| July 3 | ISO week date | 2026-W27-5 | 1.00 | infobox |
| July 3 | Japanese | 19 Satsuki, Reiwa 8 (Geshi, 4 days until Shōsho) | 1.00 | infobox |
| July 3 | Julian | 20 June, AD 2026 (AM 7534) | 1.00 | infobox |
| July 3 | Julian day | 2461225 | 1.00 | infobox |
| July 3 | Maya | 13.0.13.13.2 15 Tzec, 6 Ik | 1.00 | infobox |
| July 3 | Roman | ante diem XII Kalendas Iulias, MMDCCLXXIX AUC | 1.00 | infobox |
| July 3 | Solar Hijri | 12 Tir, SH 1405 | 1.00 | infobox |
| July 3 | is a | 184th day of the year | 0.90 | text |
