Data Cleaning Exercises

Dataset pack

Event dates by source

Events from three systems, one of which sends US-style slash dates.

Fictional data · UTF-8 CSV, every value quoted so padding and leading zeros survive; empty fields are missing values · free for personal and classroom practice · practise it in Measure how many dates parse, per source.

events 16 rows × 3 columns

Download events.csv (Pro)

Data dictionary

id
Unique event ID.
source
Source system.
event_date
Event date as sent.

Values are shown in quotes so leading and trailing spaces are visible. ∅ means the cell is missing. Exercises are also graded on hidden datasets that are never published.