1) עלות השחר is usually בדיעבד but it becomes לכתחילה when you have no other options because of work, flights, other אונסים 😕⏰➡️😁⏰
- Ex. Someone who leaves to work in the morning during the winter might already be working before the זמן of מי שיכיר, so עלות השחר becomes לכתחילה 👨💼❄️
2) You should say קריאת שמע as close to נץ החמה as possible and shouldn’t delay for no reason, even after the זמן passes 🌅