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Important Dates: High School Year 2025-2026

 ECP Important Dates 2025-2026 (pdf)

FALL SEMESTER 2025

Session

Code

Approximate Start Date

Approximate End Date

Registration Add or Drop Date

Withdraw Deadline

Grading Open

Grading Closed

5:00 PM

ISU On-Campus

1

08/25/2025

12/19/2025

09/08/2025

10/31/2025

12/08/2025

12/22/2025

Fall Semester

HF

08/13/2025

01/16/2026

10/10/2025

10/24/2025

12/12/2025

01/20/2026

Year-Long

HY

08/13/2025

06/05/2026

10/10/2025

01/16/2026

05/15/2026

06/05/2026

1st Trimester

H1

08/13/2025

11/26/2025

10/10/2025

10/24/2025

11/07/2025

12/09/2025

1st and 2nd Trimester

H12

08/13/2025

03/06/2026

10/10/2025

10/24/2025

02/20/2026

03/10/2026

2nd Trimester

H2

11/17/2025

03/06/2026

01/09/2026

01/16/2026

02/20/2026

03/10/2026

2nd and 3rd Trimester

H23

11/17/2025

06/05/2026

01/09/2026

01/16/2026

05/15/2026

 06/05/2026

Block 1

B1

08/13/2025

10/03/2025

09/12/2025

09/19/2025

09/26/2025

10/07/2025

Block 2

B2

10/06/2025

11/19/2025

10/24/2025

10/31/2025

11/07/2025

12/09/2025

Block 3

B3

11/17/2025

01/23/2025

12/12/2025

12/19/2025

01/16/2026

01/27/2026

 

SPRING SEMESTER 2026

Session

Code

Approximate Start Date

Approximate End Date

Registration Add or Drop Date

Withdraw Deadline

Grading Open

Grading Closed

5:00 PM

ISU On-Campus

1

01/12/2026

05/08/2026

01/26/2026

03/20/2026

04/27/2026

05/12/2026

Spring Semester

HS

01/19/2026

06/05/2026

02/13/2026

03/13/2026

05/15/2026

06/05/2026

3rd Trimester

H3

03/02/2026

06/05/2026

03/20/2026

04/10/2026

05/15/2026

06/05/2026

Block 4

B4

01/26/2026

03/06/2026

02/13/2026

02/20/2026

02/20/2026

03/10/2026

Block 5

B5

03/09/2026

04/24/2026

03/20/2026

04/03/2026

04/17/2026

04/28/2026

Block 6

B6

04/27/2026

06/05/2026

05/08/2026

05/15/2026

05/15/2026

06/05/2026

 

SUMMER SEMESTER 2025

Session

Code

Approximate Start Date

Approximate End Date

Registration  Add or Drop Date

Withdraw Deadline

Grading Open

Grading Closed

5:00 PM

ISU On-Campus

Visit www.isu.edu/registrar/calendars for registration, drop, and withdraw deadlines for on-campus summer courses.

Summer

HU

06/01/2026

08/21/2026

06/26/2026

07/10/2026

07/24/2026

08/25/2026

 
Please Note: Students who withdraw from a course after the drop date are still financially obligated for payment of the course

 

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