In this ideograph, the symbol for a sunrise is combined with a point of light. The point of light marks the transition from night to day at the summer solstice, when the sun rises in the north-east. Hence, this is the noun summer solstice or midsummer day.
Illustrative Text Reference:
Nausharo: Seal: NS-6 A (There is no view a): Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 408: Collections in Pakistan: Suomalainen Tiedeakatemia.
Image Credit:
Midsummer Day (a modified version of Mahadevan's sign number 293): Lynn Fawcett, 2017.