The Department of Education (DepEd) Important Dates September 2025 features a wide range of observances and testing schedules. These events highlight themes such as peace, literacy, teacher appreciation, family unity and environmental protection alongside major assessment milestones like the National Achievement Test (NAT) and the National Career Assessment Examination (NCAE).
The DepEd Calendar Important Dates for September 2025 (SY 2025–2026) combine academic testing schedules and significant national and international observances. From the NAT and NCAE to celebrations of literacy, peace, teachers, environment and family, these events enrich learning and community life.
By observing these dates, schools not only comply with legal mandates and DepEd orders but also enrich the holistic formation of learners. Below is a detailed guide to the DepEd Calendar Important Dates for September 2025, complete with their meaning, significance and legal bases.
DepEd Calendar – SEPTEMBER 2025
| DATE | DEPED ACTIVITIES – SEPTEMBER 2025 |
| SEPTEMBER 1, 2025 (Monday) | End of Testing Window for NAT Grade 10 |
| SEPTEMBER 5, 2025 (Friday) | Start of National Teachers’ Month Celebration |
| SEPTEMBER 8 – 26, 2025 | Testing Window for NCAE |
| CLASS DAYS: 22 |
SEPTEMBER 2025 Other Activities and Observances / Celebrations
| Date | Activities and / Observances | Legal Bases / Source |
| September 1 – 30, 2025 | National Peace Consciousness Month | PP No. 675, s. 2004 |
| September 1 – 30, 2025 | Maritime and Archipelagic Nation Awareness Month | PP No. 316, s. 2017 |
| 1st Week of September | National Crime Prevention Week | PP No. 461, s. 1994 |
| September 2 – 8, 2025 | Literacy Week Celebration | PP No. 239, s. 1993 |
| September 8, 2025 | International Literacy Day | UNESCO in its 14th Session in November 1966 |
| September 5 – October 5, 2025 | National Teachers’ Month | PP No. 242, s. 2011 |
| September 10, 2025 | World Suicide Prevention Day | Health Calendar 2023 (DOH) https://doh.gov.ph/healthcalendar |
| September 21, 2025 | International Day of Peace in the Philippines | PP No. 1881 s. 2009 |
| 3rd Saturday of September | International Coastal Clean-up Day | PP No. 470 s. 2003 |
| 3rd Week of September | Linggo ng Kasuotang Pilipino | PP No. 241, s. 1993 |
| 4th Monday of September | Salu-salo ng Pamilya Mahalaga Day | PP No. 1895, s. 2009 |
| Last Week of September | Family Week | PP No. 60 s. 1992 |
September 1, 2025 (Monday) – End of Testing Window for NAT Grade 10
What is it?
The National Achievement Test (NAT) is a standardized assessment administered to Grade 10 students to measure learning competencies in core subjects. The end of the testing window marks the conclusion of the scheduled period for administering the NAT. Schools across the Philippines finalize their test administration on this date.
Why is it important?
It is important because the NAT provides valuable data on student performance and the effectiveness of basic education programs. Results guide curriculum improvements, teacher strategies and policy-making. By concluding the NAT, DepEd ensures proper documentation and evaluation of learners’ academic progress.
Legal Basis: DepEd Assessment Framework & Testing Programs
September 1–30, 2025 – National Peace Consciousness Month
What is National Peace Consciousness Month?
National Peace Consciousness Month is a nationwide observance held every September to highlight the importance of cultivating a culture of peace. It encourages Filipinos to engage in activities that foster harmony, dialogue and mutual respect. The observance also integrates peace education and advocacy into schools, communities and institutions.
Why is it observed?
It is observed to promote conflict resolution through non-violent means and strengthen unity across diverse sectors of society. The celebration seeks to deepen awareness of the role of peace in achieving sustainable development. By focusing on reconciliation and inclusive participation, it reinforces national stability and progress.
Legal Basis: Proclamation No. 675, s. 2004
September 1–30, 2025 – Maritime and Archipelagic Nation Awareness Month
What is Maritime and Archipelagic Nation Awareness Month?
This observance recognizes the Philippines as a maritime and archipelagic nation, home to rich marine biodiversity and vast territorial waters. It highlights the role of seas and oceans in national identity, livelihood and ecological balance. The celebration calls for awareness of the Philippines’ strategic position in global maritime affairs.
Why is it important?
It is important because it strengthens responsibility in protecting marine ecosystems and ensuring maritime security. The observance calls on government, industry and citizens to collaborate in safeguarding marine heritage. By celebrating this month, Filipinos are reminded of their duty to act as stewards of the seas.
Legal Basis: Proclamation No. 316, s. 2017
1st Week of September – National Crime Prevention Week
What is National Crime Prevention Week?
National Crime Prevention Week is a campaign that encourages awareness and action against crime. It engages schools, civic groups and communities in programs that educate people on preventing criminal activities. The observance also empowers citizens to play a proactive role in ensuring safe neighborhoods.
Why is it observed?
It is observed to emphasize that safety and security are shared responsibilities between law enforcement and the public. The week encourages vigilance, cooperation and reporting as effective measures to prevent crime. By raising awareness, it fosters trust and strengthens community resilience.
Legal Basis: Proclamation No. 461, s. 1994
September 2–8, 2025 – Literacy Week Celebration
What is Literacy Week?
Literacy Week is a national campaign highlighting the importance of literacy as a foundation for empowerment and progress. It promotes reading, writing and digital literacy in schools and communities. The observance engages learners and educators in activities that foster lifelong learning.
Why is it significant?
It is significant because literacy reduces poverty, supports participation in governance and builds capable societies. The celebration strengthens partnerships among schools, NGOs, and government institutions to expand literacy programs. By focusing on literacy, the nation builds a strong base for sustainable development.
Legal Basis: Proclamation No. 239, s. 1993
September 5, 2025 (Friday) – Start of National Teachers’ Month Celebration
What is it?
This date marks the official start of National Teachers’ Month, a month-long observance dedicated to honoring Filipino educators. Schools and communities begin activities to recognize teachers’ dedication and sacrifices.
Why is it important?
It is important because teachers are nation-builders who shape the values and knowledge of future generations. The celebration highlights the need to support and uplift the teaching profession. By starting Teachers’ Month, society expresses gratitude to educators nationwide.
Legal Basis: Proclamation No. 242, s. 2011
September 5–October 5, 2025 – National Teachers’ Month
What is the National Teachers’ Month?
National Teachers’ Month is a full-month tribute to educators. It includes recognition programs, student-led initiatives, and community appreciation activities. The observance aligns with World Teachers’ Day on October 5.
Why is it observed?
It is observed to honor teachers’ contributions to learning and development. The month strengthens respect for the teaching profession and highlights the sacrifices of educators. By celebrating teachers, society acknowledges education as a foundation of progress.
Legal Basis: Proclamation No. 242, s. 2011
September 8, 2025 – International Literacy Day
What is International Literacy Day?
International Literacy Day, declared by UNESCO in 1966, is a global observance promoting literacy as a universal human right. It reminds nations of their duty to ensure equitable access to education. Schools and organizations worldwide conduct programs highlighting the power of literacy in transforming lives.
Why is it important?
It is important because literacy improves opportunities, reduces inequality and enhances quality of life. The observance urges collective action to provide education for marginalized communities. By joining this celebration, the Philippines affirms its commitment to global education goals.
Legal Basis: UNESCO Proclamation, 14th Session, November 1966
September 8–26, 2025 – Testing Window for NCAE
What is it?
The National Career Assessment Examination (NCAE) is a standardized test administered to secondary students to measure aptitude and career readiness. The testing window spans September 8–26, giving schools flexibility in administration.
Why is it important?
It is important because the NCAE guides students in career decision-making and educational pathways. Results inform learners, parents and teachers about skills aligned with future professions. By conducting the NCAE, DepEd supports career guidance and workforce readiness.
Legal Basis: DepEd Assessment Framework & Testing Programs
September 10, 2025 – World Suicide Prevention Day
What is World Suicide Prevention Day?
World Suicide Prevention Day is an international observance that raises awareness about mental health and suicide prevention. It serves as a platform for communities to learn about intervention strategies and early support. Schools, workplaces and organizations participate in campaigns to break the stigma surrounding mental health.
Why is it significant?
It is significant because it addresses a global health concern that impacts individuals, families and communities. The observance encourages compassion, professional help and stronger support systems. By raising awareness, it helps build environments where individuals feel understood and valued.
Legal Basis: DOH Health Calendar 2023
September 21, 2025 – International Day of Peace in the Philippines
What is the International Day of Peace in the Philippines?
The International Day of Peace aligns with the United Nations’ global call for peace every September 21. It is celebrated nationwide with forums, peace education and community initiatives. The observance emphasizes dialogue and reconciliation in addressing conflicts.
Why is it important?
It is important because it encourages non-violent solutions and promotes social harmony. The observance calls on Filipinos to work toward inclusive and just communities. By marking this day, the Philippines strengthens its global and national commitment to peace.
Legal Basis: Proclamation No. 1881, s. 2009
3rd Saturday of September – International Coastal Clean-up Day
What is International Coastal Clean-up Day?
International Coastal Clean-up Day is a worldwide initiative that mobilizes volunteers to clean beaches and waterways. It highlights the problem of marine pollution and plastic waste. In the Philippines, communities, schools and organizations take part in clean-up drives every year.
Why is it observed?
It is observed to protect marine life and preserve the health of oceans and coastal ecosystems. The observance strengthens community responsibility in addressing environmental issues. By joining this event, Filipinos contribute to global efforts in saving the planet.
Legal Basis: Proclamation No. 470, s. 2003
3rd Week of September – Linggo ng Kasuotang Pilipino
What is Linggo ng Kasuotang Pilipino?
Linggo ng Kasuotang Pilipino is a cultural celebration that highlights traditional Filipino attire. It encourages citizens to proudly wear native garments in schools, offices, and communities. The week showcases the artistry and heritage embedded in Filipino clothing traditions.
Why is it significant?
It is significant because it promotes national pride and supports the livelihood of local artisans. The observance reminds Filipinos of their cultural identity and heritage. By wearing traditional attire, citizens express respect for history and cultural diversity.
Legal Basis: Proclamation No. 241, s. 1993
4th Monday of September – Salu-salo ng Pamilyang Mahalaga Day
What is Salu-salo ng Pamilyang Mahalaga Day?
This special day highlights the importance of family unity and bonding. It encourages families to gather, share meals and spend quality time together. The observance symbolizes the Filipino value of placing family at the center of life.
Why is it observed?
It is observed to promote strong relationships and emphasize work-life balance. The day encourages open communication and shared experiences among family members. By strengthening family ties, the observance contributes to building resilient communities.
Legal Basis: Proclamation No. 1895, s. 2009
Last Week of September – Family Week
What is Family Week?
Family Week is a nationwide celebration recognizing the family as the foundation of society. It highlights the role of families in raising responsible, loving and values-oriented citizens. Activities include seminars, gatherings and advocacy events that promote family welfare.
Why is it important?
It is important because strong families are vital for building a stable and progressive nation. The observance promotes responsible parenthood, child protection and moral guidance. By celebrating Family Week, Filipinos renew their commitment to preserving family-centered values.
Legal Basis: Proclamation No. 60, s. 1992
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