When you go to bed during night, you should say:" O Allah, I surrender myself to Thee and entrust my affair to Thee, with hope in Thee and fear of Thee. There is no resort and no deliverer (from hardship but Thou). I affirm my faith in the Book which Thou revealed and in the Messengers whom Thou sent." If you die in this state you would die on Fitra, and Ibn Bashshdr did not make a mention of" night" in this hadith.
أَنَّ رَسُولَ اللَّهِ ﷺ أَمَرَ رَجُلاً إِذَا أَخَذَ مَضْجَعَهُ مِنَ اللَّيْلِ أَنْ يَقُولَ اللَّهُمَّ أَسْلَمْتُ نَفْسِي إِلَيْكَ وَوَجَّهْتُ وَجْهِي إِلَيْكَ وَأَلْجَأْتُ ظَهْرِي إِلَيْكَ وَفَوَّضْتُ أَمْرِي إِلَيْكَ رَغْبَةً وَرَهْبَةً إِلَيْكَ لاَ مَلْجَأَ وَلاَ مَنْجَا مِنْكَ إِلاَّ إِلَيْكَ آمَنْتُ بِكِتَابِكَ الَّذِي أَنْزَلْتَ وَبِرَسُولِكَ الَّذِي أَرْسَلْتَ فَإِنْ مَاتَ مَاتَ عَلَى الْفِطْرَةِ وَلَمْ يَذْكُرِ ابْنُ بَشَّارٍ فِي حَدِيثِهِ مِنَ اللَّيْلِ