When should Ayat al-Kursi be recited?
The Quran does not prescribe an obligatory time for reciting Ayat al-Kursi; it may be recited at any time. Sahih al-Bukhari 2311 contains the bedtime report that speaks of protection until morning. A separate report about reciting it after obligatory prayers is attributed to al-Nasa'i and is cited in Bulugh al-Maram together with Ibn Hibban's authentication. Jami at-Tirmidhi 2879 is a different morning-and-evening report and is graded weak in the public hadith reference used here, so these timings should not be presented as though they all rest on evidence of the same strength. These recitations belong to voluntary remembrance and virtue; they are not conditions for a prayer's validity and do not replace practical health or safety measures.
For general information only; different schools of thought and scholars may hold differing views.