Solution:
The calendar shows that December 12, 2025, falls on a Friday.
Significance of the Constitution for every Russian citizen:
- The Constitution is the fundamental law of Russia, establishing the principles of state structure, human rights, and freedoms.
- It guarantees citizens basic rights such as freedom of speech, assembly, and religion.
- The Constitution provides a legal framework for the functioning of government bodies and ensures the rule of law.
- It serves as a basis for developing other laws and regulations, protecting citizens' interests and national security.
- Adherence to the Constitution upholds democratic values and the stability of the Russian Federation.
Answer: Friday. The Constitution is the supreme law, guaranteeing fundamental rights and freedoms, ensuring the rule of law, and serving as the foundation for the country's legal system and democratic development.