Coinciding with the celebration of the Feast of Santo Niño and the Ati-atihan Festival, Infant Jesus School celebrated its annual IJSian Week event from January 12 to 16, 2026.
The event began on January 12, 2026, with a street parade in which the two competing houses, Aracoeli and Atocha, participated wearing their respective yellow and green t-shirts.
As the houses arrived at school, the event was followed by an opening program featuring the lighting of flames to mark the start of the friendly rivalry. Mass demonstrations by pre-school and elementary students came next, followed by the "SIGAYAW: Sigaw at Sayaw" competition performed by high school students. The afternoon marked the official opening of the Sports and THINKATHLON events.