September 30

Calendar position and characteristics

The modern placement of September 30 reflects the Roman-derived naming of months: "September" comes from septem, Latin for seven, a vestige of an earlier calendar in which it was the seventh month. Its fixed position near the end of the third quarter of the year makes it important for administrative and fiscal cycles in many organizations.

Observances and traditions

This date hosts a variety of secular and religious commemorations worldwide. The Christian calendar marks the feast of Saint Jerome, historically venerated as a translator and scholar. Because of that association, translators and language professionals observe International Translation Day on September 30; the day is recognized and promoted by translation organizations and international bodies concerned with cultural exchange. Several countries and communities hold national or local celebrations on this date as well.

Notable civic and historical uses

September 30 is the last day of the United States federal fiscal year, making it a routine deadline for budgetary and administrative measures in the U.S. government. It is also a national day in some countries; for example, Botswana celebrates its national independence on this date. The day has been the scene of notable historical events and diplomatic acts, and thus recurs in chronologies of 20th-century politics and law.

Examples and distinctions

• Religious: Feast of Saint Jerome, associated with translation and scholarship.
• Cultural: International Translation Day, observed by translators and language professionals.
• Civic: End of the U.S. federal fiscal year and various national anniversaries.

For general information about the system that defines this date, see the Gregorian calendar. The way September 30 is observed varies widely by country, faith tradition, and institution, so local calendars and official sources provide the most specific details for particular observances.