Happy New Year to Muslims and Jews Both: in a Rare Year Where AH 1 Muharram 1438 and AM 1 Tishrei 5777 Coincide

Shana Tova to Jewish readers on this first day of Rosh Hashonah,  which began at sundown. But also Happy New Year to Muslim readers in an extremely rare occasion when Jewish New Year coincides with Ra's al-Sana al-Hijriyya, the Muslim New Year. (And of course,  Rosh Hashonah and Ra's al-Sana are cognate, and both mean "Head of the Year.")  But the calendars are quite different, with Muslim lunar dates moving around through the solar year, and this kind of coincidence is purely that. But Happy New Year whether you're welcoming in 1438 or 5777.