Our MNL-DGT flight Saturday afternoon was full of people going to the Sinulog festival.

https://en.m.wikipedia.org/wiki/Sinulog

Presumably from Dumaguete they took the Sibulan-Santander ferry and then travelled by land up the Cebu coastline.

Coincidentally, on Tuesday, 9 January, my better half & I were in Rizal Park the evening after the beginning of the Black Nazarene procession -- during which wi-fi was turned off for "security".

https://en.m.wikipedia.org/wiki/Black_Nazarene