The Prophet ﷺ was asked about the slaughtering, shaving (of the head), and the doing of Rami before or after the due times. He said, "There is no harm in that."  

أَنَّ النَّبِيَّ ﷺ قِيلَ لَهُ فِي الذَّبْحِ وَالْحَلْقِ وَالرَّمْىِ وَالتَّقْدِيمِ وَالتَّأْخِيرِ فَقَالَ: «لاَ حَرَجَ۔»  

The Prophet ﷺ was asked (as regards the ceremonies of Hajj) at Mina on the Day of Nahr and he replied that there was no harm. Then a man said to him, "I got my head shaved before slaughtering." He replied, "Slaughter (now) and there is no harm in it." (Another) man said, "I did the Rami (of the Jimar) after midday." The Prophet ﷺ replied, "There was no harm in it."  

كَانَ النَّبِيُّ ﷺ يُسْأَلُ يَوْمَ النَّحْرِ بِمِنًى فَيَقُولُ لاَ حَرَجَ فَسَأَلَهُ رَجُلٌ فَقَالَ حَلَقْتُ قَبْلَ أَنْ أَذْبَحَ قَالَ اذْبَحْ وَلاَ حَرَجَ وَقَالَ رَمَيْتُ بَعْدَ مَا أَمْسَيْتُ فَقَالَ لاَ حَرَجَ