Month

Source code

Description

Extract month from underlying Date representation. Applies to Date and Datetime columns. Returns the month number starting from 1. The return value ranges from 1 to 12.

Usage

<Expr>$dt$month()

Value

Expr of month as UInt32

Examples

library("polars")

df = pl$DataFrame(
  date = pl$date_range(
    as.Date("2020-12-25"),
    as.Date("2021-1-05"),
    interval = "1d",
    time_zone = "GMT"
  )
)
df$with_columns(
  pl$col("date")$dt$month()$alias("month")
)

#> shape: (12, 2)
#> ┌────────────┬───────┐
#> │ date       ┆ month │
#> │ ---        ┆ ---   │
#> │ date       ┆ i8    │
#> ╞════════════╪═══════╡
#> │ 2020-12-25 ┆ 12    │
#> │ 2020-12-26 ┆ 12    │
#> │ 2020-12-27 ┆ 12    │
#> │ 2020-12-28 ┆ 12    │
#> │ 2020-12-29 ┆ 12    │
#> │ …          ┆ …     │
#> │ 2021-01-01 ┆ 1     │
#> │ 2021-01-02 ┆ 1     │
#> │ 2021-01-03 ┆ 1     │
#> │ 2021-01-04 ┆ 1     │
#> │ 2021-01-05 ┆ 1     │
#> └────────────┴───────┘