1) שולחן ערוך says that EVERYONE agrees that the end of the זמן of קריאת שמע is שלש שעות
Which is 3 hours into the HALACHIC day(1/4 of the HALACHIC day)
🤝🔚⏰
2) This is the time when the princes and בני מלכים would get up (they were the late risers, so that’s why that’s when the זמן ends.)🤴🫅
3) Although everyone agrees that the זמן ends in the 3rd HALACHIC hour, the גר״א and מגן אברהם have different שיטות as to when the 3rd hour is. So the הלכה למעשה is that it’s better to do like the מגן אברהם (earlier זמן). But we do follow the גר״א, so if the זמן of the מגן אברהם passed, don’t even worry but make sure to catch the זמן of the גר״א‼️🥱
