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| Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
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Class of 2026 Sweatshirt Sale!
August 1, 2025
A fun annual tradition and privilege, SOSM 8th-grade students have the option of ordering a 'Class of 2026' sweatshirt. |
Class of 2026 Sweatshirt Sale!
August 2, 2025
A fun annual tradition and privilege, SOSM 8th-grade students have the option of ordering a 'Class of 2026' sweatshirt. |
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Class of 2026 Sweatshirt Sale!
August 3, 2025
A fun annual tradition and privilege, SOSM 8th-grade students have the option of ordering a 'Class of 2026' sweatshirt. |
Used Uniform & CrusaderWear Sale
August 5, 2025 | 8:00 AM - 12:00 PM
Please join us for our Used Uniform and Crusader Wear SALE! $5 - skirts, jumpers, pants, shorts, sweaters, sweatshirts, fleece$3 - uniform shirts, gym shorts, gym shirts$1 belts, hair bows CASH or... |
March in the LF Days Parade
August 6, 2025 | 9:30 AM - 11:00 AM
Join the School of St. Mary community as we step out in Crusader pride at the annual Lake Forest Day Parade! |
Virtual Preschool Orientation
August 8, 2025 | 9:30 AM - 10:30 AM
We warmly invite all preschool families to join us for our Virtual Preschool Orientation on Friday, August 8th at 9:30 a.m. on Zoom. |
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First Day Virtual Q&A
August 15, 2025 | 9:00 AM - 10:00 AM
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Welcome Walk-Through (PGC)
August 18, 2025 | 10:00 AM - 12:00 PM
1st through 3rd graders are invited to stop by the PGC and meet your teacher, see your classroom, and drop off any supplies. This is a meet-and-greet event, with no formal presentation. Welcome Walk-Through (UGC)
August 18, 2025 | 1:00 PM - 3:00 PM
4th and 5th graders are invited to stop by the UGC and meet your teacher, see your classroom, and drop off any supplies. This is a meet-and-greet event, with no formal presentation. |
PreK - K Classroom Preview Day
August 19, 2025 | 9:00 AM - 3:00 PM
For Little Angels - Kindergarten. Previews are one-on-one visits between parents with students and their teacher and are scheduled by the teacher. Welcome Back Zoom
August 19, 2025 | 6:00 PM - 7:00 PM
All SOSM Parents are invited to join Principal Kathy Thompson on Zoom for a welcome-back information session |
Begin Trimester 1
August 20, 2025
First Day of School 1st - 8th
August 20, 2025
First day of school for 1st - 8th grade PGC (1st-3rd) Drop off begins at 8:30 a.m., first bell rings at 8:45 a.m.UGC (4th-8th) Drop-off begins at 8:25 a.m.; the first bell rings at 8:40 a.m. PreK - K Classroom Preview Day
August 20, 2025 | 9:00 AM - 3:00 PM
For Little Angels - Kindergarten. |
Half Day ALL Preschool & Kindergarten
August 21, 2025
All classes are half-day Little Angels dismisses at 10:30 a.m.ALL Shining Saints, Junior Kindergarten, and Kindergarten dismiss at 11:30 a.m. First Day of School - Preschool & Kindergarten
August 21, 2025
All classes are half-day Little Angels dismisses at 10:30 a.m.ALL Shining Saints, Junior Kindergarten, and Kindergarten dismiss at 11:30 a.m. |
Half Day ALL Preschool & Kindergarten
August 22, 2025
All classes are half-day Little Angels dismisses at 10:30 a.m.ALL Shining Saints, Junior Kindergarten, and Kindergarten dismiss at 11:30 a.m. First Day of School - MWF Preschool
August 22, 2025
First Day of School for Monday-Wednesday-Friday Little Angels and Shining Saints. All classes are half-day Little Angels dismisses at 10:30 a.m.ALL Shining Saints, Junior Kindergarten,... |
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Fall CrusaderWear Sale
August 24, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases |
Fall CrusaderWear Sale
August 25, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases Early Childhood Begins Regular Schedule
August 25, 2025
Preschool and kindergarten classes begin their regular schedules. Morning Extended Day
August 25, 2025 | 7:30 AM - 8:30 AM
The morning Extended Day program opens at 7:30 a.m. at both campuses. PM Extended Day
August 25, 2025 | 3:30 PM - 5:30 PM
The afternoon Extended Day programs begin at the end of the regular school day and close at 5:30 p.m. |
Fall CrusaderWear Sale
August 26, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases Morning Extended Day
August 26, 2025 | 7:30 AM - 8:30 AM
The morning Extended Day program opens at 7:30 a.m. at both campuses. School Mass (4th - 8th)
August 26, 2025 | 9:00 AM - 10:00 AM
PM Extended Day
August 26, 2025 | 3:30 PM - 5:30 PM
The afternoon Extended Day programs begin at the end of the regular school day and close at 5:30 p.m. |
Fall CrusaderWear Sale
August 27, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases Morning Extended Day
August 27, 2025 | 7:30 AM - 8:30 AM
The morning Extended Day program opens at 7:30 a.m. at both campuses. School Mass (K-3rd)
August 27, 2025 | 9:00 AM - 10:00 AM
PM Extended Day
August 27, 2025 | 3:30 PM - 5:30 PM
The afternoon Extended Day programs begin at the end of the regular school day and close at 5:30 p.m. |
Fall CrusaderWear Sale
August 28, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases Morning Extended Day
August 28, 2025 | 7:30 AM - 8:30 AM
The morning Extended Day program opens at 7:30 a.m. at both campuses. PM Extended Day
August 28, 2025 | 3:30 PM - 5:30 PM
The afternoon Extended Day programs begin at the end of the regular school day and close at 5:30 p.m. |
Fall CrusaderWear Sale
August 29, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases Morning Extended Day
August 29, 2025 | 7:30 AM - 8:30 AM
The morning Extended Day program opens at 7:30 a.m. at both campuses. PM Extended Day
August 29, 2025 | 3:30 PM - 5:30 PM
The afternoon Extended Day programs begin at the end of the regular school day and close at 5:30 p.m. |
Fall CrusaderWear Sale
August 30, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases |
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Fall CrusaderWear Sale
August 31, 2025
The SOSM Crusaderwear online store is open! Visit 2025/26 SOSM Crusaderwear Store to make your purchases |
We are in the process of moving to MySOSM (Blackbaud School Management System). You received an email in May about this upgrade (read it here). While we transfer systems, the complete, daily school calendar is not available.
Please see the link below for the 2025-2026 Calendar Highlights, which was sent to all school families in April. This includes all the days off, breaks, early dismissals, etc. The second page of the PDF contains all the special days (e.g., Special Person Day, Catholic Schools Week) that were available at the time of publishing. We are working diligently and will email all families when MySOSM is available.
Thank you for your patience.
