August 2025 Calendar

August 2025 presents a unique transitional month, bridging the peak of summer with the onset of autumn across the Northern Hemisphere. As the eighth month of the Gregorian calendar, it offers 31 days beginning on a Saturday and concluding on a Sunday. For planners, educators, and businesses, understanding the specific holidays, historical milestones, and practical scheduling details of August 2025 is essential. This comprehensive guide provides an authoritative breakdown of the month, including key observances, moon phases, historical context, and actionable planning tips, all grounded in verified data from calendar authorities and historical records.

Weekday Structure and Week Numbers for August 2025

August 2025 spans six week numbers according to the ISO week date system, running from week 31 through week 36. The month opens on Friday, August 1, which falls within week 31 (covering August 1–2). The subsequent weeks are: week 32 (August 3–9), week 33 (August 10–16), week 34 (August 17–23), week 35 (August 24–30), and week 36 (August 31 only) [3]. This structure means the month contains five Fridays, five Saturdays, and five Sundays, a pattern that occurs roughly once every 823 years for a 31-day month starting on a Friday. The month ends on Sunday, August 31, 2025, which seamlessly flows into Labor Day on Monday, September 1, 2025 [2][3].

For those tracking payroll, academic calendars, or project timelines, the weekday distribution is critical. The first weekday (Monday) falls on August 4, and the last weekday (Friday) is August 29. This configuration means that any recurring weekly events starting on a Monday will have exactly four occurrences in August, except for events starting on August 4, which will have five occurrences due to the month's length.

Holidays and Observances in August 2025

US Federal Holidays

August 2025 contains no US federal holidays. The closest federal holiday is Labor Day, which falls on Monday, September 1, 2025 [2][3]. This absence of federal holidays makes August a particularly productive month for businesses and government operations, though it also means fewer long weekends for employees. The Uniform Monday Holiday Act of 1968, which standardized many federal holidays on Mondays, did not create any August-specific observances, leaving the month as a holiday-free zone in the federal calendar.

Major Recognized Observances

August 2025 features several significant observances that carry historical and social weight:

• National Mustard Day – Saturday, August 2, 2025. This unofficial food holiday celebrates one of the world's most popular condiments, with origins tied to the National Mustard Museum in Middleton, Wisconsin [1].
• 90th Anniversary of the Social Security Act – Thursday, August 14, 2025. President Franklin D. Roosevelt signed the Social Security Act into law on August 14, 1935, creating a foundational social insurance program that now covers over 67 million Americans [1]. The 2025 observance marks exactly nine decades since this landmark legislation.
• Women's Equality Day – Tuesday, August 26, 2025. This day commemorates the certification of the 19th Amendment to the US Constitution on August 18, 1920, which granted women the right to vote. The observance was established by Congress in 1971 at the behest of Representative Bella Abzug [1].
• Fourth Anniversary of the Abbey Gate Attack – Tuesday, August 26, 2025. On the same date, the US marks the anniversary of the 2021 suicide bombing at Hamid Karzai International Airport's Abbey Gate in Kabul, Afghanistan, which killed 13 US service members and over 170 Afghan civilians. This date serves as a solemn remembrance for military families and veterans [1].
• Overdose Prevention Week – Sunday, August 31 to Saturday, September 6, 2025. This awareness campaign, observed by the Substance Abuse and Mental Health Services Administration (SAMHSA), focuses on reducing drug overdose deaths through education and harm reduction strategies [1].

Month-Long Observances

National Immunization Awareness Month spans all of August 2025. Coordinated by the Centers for Disease Control and Prevention (CDC), this campaign encourages vaccination across all age groups, with particular emphasis on back-to-school immunizations for children and influenza prevention for seniors [1].

Historical Context: August's Roman Origins and Key Dates

The name "August" derives directly from Gaius Julius Caesar Octavianus, better known as Emperor Augustus, who ruled Rome from 27 BC to 14 AD. Originally, the month was called Sextilis, meaning "the sixth month" in the early Roman calendar, which began in March. The Roman Senate renamed the month in honor of Augustus in 8 BC, choosing it because it was the month of his greatest military victories, including the capture of Alexandria in 30 BC. The Julian calendar reform, implemented by Julius Caesar in 46 BC, had already stabilized August as a 31-day month by adding leap years, a structure that has remained unchanged since 153 BC [1].

Beyond ancient history, August 2025 marks several pivotal anniversaries. The Social Security Act of 1935, signed on August 14, represents one of the most significant pieces of social legislation in American history, establishing old-age pensions, unemployment insurance, and aid to dependent children. The 90th anniversary in 2025 comes amid ongoing debates about the program's long-term solvency, making it a particularly relevant historical marker.

Women's suffrage history is also deeply tied to August. The 19th Amendment was ratified by the necessary 36 states on August 18, 1920, when Tennessee became the final state to approve it. The amendment was officially certified on August 26, 1920, by Secretary of State Bainbridge Colby. Key suffragists such as Alice Paul, Susan B. Anthony (posthumously), and Carrie Chapman Catt were instrumental in this decades-long struggle [1].

Moon Phases and Astronomical Events in August 2025

While the lunar cycle does not directly influence most calendar planning, it remains relevant for outdoor events, fishing, hunting, and cultural observances. The moon phases for August 2025 are as follows (times approximate for US Eastern Time):

The Full Sturgeon Moon on August 9 derives its name from Native American Algonquian tribes, who noted that the large sturgeon fish were most easily caught during this month in the Great Lakes and Lake Champlain. This full moon also marks the peak of the Perseid meteor shower, which typically reaches maximum activity around August 11–13, though moonlight may interfere with visibility in 2025.

Sunrise and sunset times vary significantly by latitude. For example, in New York City on August 1, 2025, sunrise occurs at approximately 6:00 AM and sunset at 8:07 PM, yielding about 14 hours of daylight. By August 31, sunrise shifts to about 6:23 AM and sunset to 7:31 PM, reducing daylight to roughly 13 hours. In more northerly locations like Seattle, the change is more pronounced, with sunrise moving from 5:45 AM to 6:27 AM over the month [3].

Zodiac Signs, Birthstones, and Flowers

August 2025 straddles two zodiac signs. Leo (the Lion) rules from July 23 through August 22, while Virgo (the Virgin) takes over from August 23 through September 22 [1]. This transition occurs on August 23 each year, though the exact time varies. For 2025, the Sun enters Virgo at approximately 8:45 AM ET on August 23, making anyone born on that date a Virgo.

The birthstone for August is peridot, a vibrant green gemstone formed deep within the Earth's mantle and sometimes brought to the surface by volcanic activity. Peridot has been valued since ancient Egyptian times, when it was mined on the island of Zabargad in the Red Sea. The month's official flowers are the poppy (symbolizing imagination and eternal sleep) and the gladiolus (representing strength of character and integrity), both of which bloom profusely in late summer [1].

Practical Planning Tips for August 2025

August 2025 requires careful scheduling due to its holiday-free status and the back-to-school transition. Here are key planning considerations:

• School Start Dates: Many US school districts begin the academic year in late August. Common start dates include the week of August 25–29, 2025. Districts in states like Texas, Florida, and Georgia often start in early to mid-August, while northeastern states typically begin after Labor Day. Always verify with local school boards, as calendars vary dramatically even within the same state [5].
• Printable Calendar Resources: Over 107 free printable August 2025 calendars are available from sources like Printabulls, offering formats including blank templates, holiday-marked versions, Monday-start layouts, and two-page spreads [5]. WaterproofPaper provides a simple PDF grid without holidays, ideal for custom planning [6]. Calendarpedia offers PDF, Excel, and Word versions with US federal holidays clearly marked [2].
• Business and Financial Planning: With no federal holidays, August offers 21 full business days (Monday through Friday). However, many businesses experience reduced productivity as employees take summer vacations. The week of August 11–15 and the week of August 25–29 are typically the busiest for back-to-school shopping, with the National Retail Federation projecting strong consumer spending during these periods.
• Overdose Prevention Week Planning: Organizations planning events for Overdose Prevention Week (August 31–September 6) should note that the observance starts on a Sunday, potentially allowing for weekend programming. Coordination with local health departments and SAMHSA resources is recommended [1].

Frequently Asked Questions About August 2025

For more detailed calendar resources, visit our calendar hub for year-round planning tools. Those interested in historical calendar reforms may also find our reviews of various calendar systems informative.