The feast day of St. Therese of Lisieux, known as the “little flower” is October 1 for the new calendar and October 3rd for the traditional calendar. There are several pilgrimage sites in the US you can visit to honor her.
National Shrine of St. Therese Darien, IL -includes a chapel and a museum that has the largest collection of St. Therese relics and memorabilia outside ofLisieux,France. The collection includes relics, an original oil painting of her done by her sister Celine, the original statue commissioned by St. Therese in the 1920’s, manuscripts she wrote, as well as items from her childhood and throughout her life.
Maria Stein Shrine Maria Stein, OH – The Maria Stein Shrine of the Holy Relics houses more 1,000 relics (95% of which are first class relics), the 2nd largest collection open for veneration in the United States, including relics of St. Therese of Lisieux
If you can’t make it to a pilgrimage site, you can watch “Heart of the Matter” at 10pm EST on Saturday, October 1st on EWTN, which covers the many graces received in Great Britain during the tour of St. Therese’s relics.
This video from Catholic News Agency gives a brief overview of St. Therese.