Looker Studio is now called Data Studio. Learn more about this change.
DAY
Returns the day of the month of a given date.
Sample usage
DAY(Date)
Syntax
Returns the day from a Date or Date & Time value.
Day( date_expression )Returns the day from a compatibility mode Date value.
DAY( X [, format_string ])
Parameters
date_expression- a Date or Date & Time field or expression.X- a field or expression that evaluates to Text, Number, or compatibility mode Date.format_string- format forX.Optional ifXis correctly configured as a semantic date field.
Format strings for compatibility mode dates
Supported date functions accept the following input formats if X is a Text field or expression, or compatibility mode Date:
- Any valid strptime format is accepted.
'BASIC':%Y/%m/%d-%H:%M:%S'DEFAULT_DASH':%Y-%m-%d [%H:%M:%S]'DEFAULT_SLASH':%Y/%m/%d [%H:%M:%S]'DEFAULT_DECIMAL':%Y%m%d [%H:%M:%S]'RFC_1123':for example, 2008年5月24日 20:09:47 GMT'RFC_3339':for example, 2008年05月24日T20:09:47Z'DECIMAL_DATE':same as'DEFAULT_DECIMAL'
Supported time functions accept the following input format if X is a Number field or expression:
'SECONDS':seconds since Epoch'MILLIS':milliseconds since Epoch'MICROS':microseconds since Epoch'NANOS':nanoseconds since Epoch'JULIAN_DATE':days since Epoch
Examples
| Example formula | Input | Output |
|---|---|---|
DAY(Date) |
Jan 1, 2019 | 1 |
DAY(Date as Text, 'BASIC') |
2019年01月01日-09:40:45 | 1 |
DAY(Date as Number, 'SECONDS') |
1561784874 | 29 |
DAY(Date as lots of Numbers, 'MILLIS') |
1562004058620 | 1 |
Notes
This function works with both compatibility mode dates and upgraded Date and Date & Time data types.