If that is the case, then just as Moses was used to bring Israel into the Law covenant on that day, so Jesus Christ now brought a new nation, spiritual Israel, into the new covenant on the same day.
‏ [١] ‏ (‏ اَلْفِقْرَةُ ٤ )‏ مِنَ ٱلْمُحْتَمَلِ أَنَّ عِيدَ ٱلْخَمْسِينَ وَقَعَ فِي نَفْسِ ٱلْيَوْمِ مِنَ ٱلسَّنَةِ ٱلَّذِي أُعْطِيَتْ فِيهِ ٱلشَّرِيعَةُ لِمُوسَى فِي سِينَاءَ .‏