Can we observe fasting on Muharram 1st or the first of Suro, What's th…

There are several dates in the month of Muharram that are advised for observing voluntary fasting with various virtues. So, is it allowed to observe voluntary fasting on the 1st of Muhar

Ashura fast.
كَانَ يَوْمُ عَاشُورَاءَ يَوْمًا تُعَظِّمُهُ الْيَهُودُ وَتَتَّخِذُهُ عِيدًا فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صُو