Looker Studio Function : PARSE_DATE
Category: DATE function
The PARSE_DATE function in Looker Studio is used to convert a text or string value into a valid date format based on a specified date pattern. This function is extremely useful when working with raw data imported from external systems where dates are stored as text values instead of formatted date fields.
Without converting these text strings into real date types, Looker Studio cannot perform date operations like sorting, filtering, grouping, or time-series analysis.
Purpose of the PARSE_DATE Function
1. Convert text to date format
Transforms string-based dates into actual date data types
2.Enable date calculations
Allows time-based filtering, aggregation, and comparison
3. Fix incorrect or inconsistent date formats
Standardizes all dates in one valid structure for reporting.
Why Use PARSE_DATE in Looker Studio?
Key Benefits & Use Cases
✔ Fix broken or unrecognized date formats
✔ Transform imported CSV, Excel, CRM, or API data
✔ Convert custom or regional formats like DD-MM-YYYY or MM/DD/YYYY
✔ Enable proper sorting & charting in time-series visualizations
✔ Makes date values usable in functions like DATE_DIFF, TODATE, DATE_TRUNC, etc.
PARSE_DATE(format_string, text_date)
| Parameter | Type | Description |
|---|---|---|
| format_string | String | Format pattern of the original date string |
| text_date | Text |
How the PARSE_DATE Function Works?
PARSE_DATE reads the structure of a text-based date string and converts it into a valid date type that Looker Studio can understand, store, and use for calculations.
When should use the PARSE_DATE Function Work?
Use PARSE_DATE when:
Your dates appear as text fields or are not automatically recognized as dates
You need to convert regional formats (e.g., DD/MM/YYYY vs MM-DD-YYYY)
You want to enable filters like Month, Quarter, Year, and Date Range
You are preparing time-series charts or forecast dashboards
Examples of PARSE_DATE
Example 1: Convert DD-MM-YYYY format
PARSE_DATE("%d-%m-%Y", Order_Date_Text)
If the field contains:15-06-2025 → Output: 2025-06-15
Example 2: Convert MM/DD/YYYY format
PARSE_DATE("%m/%d/%Y", Signup_Date)
If value is 06/20/2025 → Output: 2025-06-20
Example 3: Calculate Days Between Two Dates
UNIX_DATE(End_Date) - UNIX_DATE(Start_Date)
Use case: To calculate project duration, delivery gap, customer response time, etc.
Tips & Best Practices
💡 Match the exact format pattern with how the date string is stored
💡 Use CAST() if numbers need to be treated as text
💡 If parsing fails, check spacing, separators, or missing zeros
💡 Use with TODATE() for grouping by month, quarter, year
💡 Works only with date values (not time values)
To convert text or string-based dates into actual date format to enable date calculations, grouping, and time-series visualizations.
Yes, but convert to text first using CAST(number AS STRING).
Yes. It supports any format using pattern codes like %d, %m, %Y, %b, %a, etc.
It enables sorting, filtering, comparison, and aggregation based on calendar logic instead of raw text.
Absolutely. It is essential when a chart requires valid date fields instead of plain text.
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