Bro Sa Re Ga Ma Pa Grand Premiere On October 15th At 07.00 Pm Which Is On SundayI think so,
Maybe both(logo change & launch of HD channel) will be in this two days.
Also there is grand premier of sa re ga ma pa for 3 hours tomorrow. So Most probably it'll change tomorrow 7pm.
They planned like star maa movies (logo change & HD launch)