‎Ibnu Uthaymeen رحمه الله said: ‎What is surprising is that people are heedless about these ten days. You will find them striving in the last ten nights of Ramadan, but in the ten days of Dhul Hijjah, you will almost not find anyone who distinguishes them from other days, however, ‎if a person performs righteous deeds in these ten days, giving life to what the Prophet صلى الله عليه وسلم directed to, then verily, he is on tremendous good." ‎[Majmoo Al-Fataawaa (37/21)]