Identical or not?

Let's format the problem in a structural way. Look, in this problem, there are 3 events in the spacetime: $$ 1. Supantho in his rocket at 4:00 according to his clock(Fig. 1) $$ 2. Mohaimen in his rocket at 4:00 according to his clock(Fig. 1) $$ 3. Mohaimen in his rocket at time '?' according to his clock(Fig. 2) $$ These 3 events are denoted by $P_1, P_2, P_3$ respectively in fig. 3: $$ $$ The primed coordinates are of Mohaimen's reference frame, and the unprimed ones of Supantho's (I mean a referance frame which is staionary w.r.t Supantho). I took $P_2$ on the origin of both reference frames, so, $x_2 = x_2' = x_3'= 0$ $t_2' = t_2 =t_1 =0$ $t_3' = t_1'$ $x_1 = 1.44 \times 10^{12}m$ We have to calculate $x_1'$ & $t_3'$ ; Using Lorentz's transformation, $x_1' = \frac{x_1 - vt_1}{\sqrt{1-\frac{v^2}{c^2}}} = 1.8 \times 10^{12} m$ $t_3' = t_1' = \frac{t_1 - \frac{vx_1}{c^2}}{\sqrt{1-\frac{v^2}{c^2}}} = -3600s = -1hr$ So the time would be 1 hour less than 4:00, that is 3:00.