diff --git a/assessment-overview.qmd b/assessment-overview.qmd
index 3d457a52..f45ddef6 100644
--- a/assessment-overview.qmd
+++ b/assessment-overview.qmd
@@ -17,7 +17,7 @@ The module is assessed through two coursework assignments:
 
 1. **Formative Assessment (CW1)** 
    - Required but non-assessed (0% of final mark)
-   - Due: 27th February 2026, 13:59
+   - Due: 20th March 2026, 13:59
    - Project plan and reproducible code demonstration
    - Length: Up to 4 pages
 
@@ -141,7 +141,7 @@ Both assessments are categorized as **GREEN** for AI usage:
 
 ## Key Dates (2025-26)
 
-- **27 February 2026, 13:59**: Formative assessment (CW1)
+- **20 March 2026, 13:59**: Formative assessment (CW1)
 - **15 May 2026, 14:00**: Summative assessment (CW2)
 - Feedback provided within 15 working days
 
diff --git a/d2/assessment-brief.qmd b/d2/assessment-brief.qmd
index f3ed976a..7f674939 100644
--- a/d2/assessment-brief.qmd
+++ b/d2/assessment-brief.qmd
@@ -20,7 +20,7 @@ Portfolio Plan and Reproducible Code Submission
 
 ###  Deadline
 
-**Non-assessed submission deadline**: 27th February 2026, 13:59.
+**Non-assessed submission deadline**: 20th March 2026, 13:59.
 
 ### Guidance
 
diff --git a/d2/index.qmd b/d2/index.qmd
index f5ea6f00..b2e84d02 100644
--- a/d2/index.qmd
+++ b/d2/index.qmd
@@ -6,7 +6,7 @@ execute:
 number-sections: false
 ---
 
-This is a formative (non-assessed but required) submission that will help you develop your final coursework. The deadline is **27th February 2026, 13:59**.
+This is a formative (non-assessed but required) submission that will help you develop your final coursework. The deadline is **20th March 2026, 13:59**.
 
 ## What to Submit
 
diff --git a/data/timetable.csv b/data/timetable.csv
index 04dae1ae..a1ae3af1 100644
--- a/data/timetable.csv
+++ b/data/timetable.csv
@@ -5,7 +5,7 @@ TDS deadline 1,Computer set-up,2026-01-30T13:00:00Z,2,Online - Teams
 "TDS Session 3: AI for transport planning (RL, YY)","TDS Session 3: AI for transport planning (RL, YY) Located in Michael Sadler SR (LG.15)",2026-02-12T10:00:00Z,3,Michael Sadler SR (LG.15)
 "TDS Session 4: Origin-destination data (RL, YY)","TDS Session 4: Origin-destination data (RL, YY) Located in Institute for Transport Studies Room 1.11a-c",2026-02-19T10:00:00Z,3,Institute for Transport Studies Room 1.11a-c
 TDS seminar 1,"Seminar 1: Juan Fonseca, University of Leeds: Traffic estimation and transport data visualisation",2026-02-19T14:00:00Z,3,Institute for Transport Studies Room 1.11a-c
-TDS deadline 2,Draft portfolio,2026-02-27T13:00:00Z,0,Online - Teams
+TDS deadline 2,Draft portfolio,2026-03-20T13:00:00Z,0,Online - Teams
 "TDS Session 5: Routing (MM, RL)","TDS Session 5: Routing (MM, RL) Located in Michael Sadler SR (LG.15)",2026-03-05T10:00:00Z,3,Michael Sadler SR (LG.15)
 TDS seminar 2,"Seminar 2: Will Deakin, Network Rail: Network simplification",2026-03-19T10:00:00Z,3,Institute for Transport Studies Room 1.11a-c
 "TDS Session 6: Joins, models and publishing your work (RL, MM, YY)","TDS Session 6: Joins, models and publishing your work (RL, MM, YY) Located in Mechanical Engineering LT B (2.37)",2026-04-30T10:00:00Z,3,Mechanical Engineering LT B (2.37)