Function make_timestamp 

pub fn make_timestamp(
    year: &Column,
    month: &Column,
    day: &Column,
    hour: &Column,
    minute: &Column,
    sec: &Column,
    timezone: Option<&str>,
) -> Column

make_timestamp(year, month, day, hour, min, sec, timezone?) - six columns to timestamp (PySpark make_timestamp). When timezone is Some(tz), components are interpreted as local time in that zone, then converted to UTC.