用R语言对日期进行排序

怎样把这一列的日期按时间先后排列呢？
目前Date是Character类型

> str(fulldata)
'data.frame':    2618 obs. of  28 variables:
 $ Team      : chr  "Miami" "Golden State" "Washington" "Dallas" ...
 $ GameNumber: int  1 1 1 1 1 1 1 1 1 1 ...
 $ Date      : chr  "26-Oct" "25-Oct" "27-Oct" "26-Oct" ...
 $ Opponent  : chr  "Orlando" "San Antonio" "Atlanta" "Indiana" ...
 $ Home      : int  0 1 0 0 1 1 1 1 0 0 ...
 $ TeamWin   : int  1 0 0 0 1 1 1 0 0 0 ...

> library(tidyverse)
> library(lubridate)
> fulldata$Date <- as.Date(fulldata$Date, "%e-%b")
> str(fulldata)
'data.frame':    2618 obs. of  28 variables:
 $ Team      : chr  "Miami" "Golden State" "Washington" "Dallas" ...
 $ GameNumber: int  1 1 1 1 1 1 1 1 1 1 ...
 $ Date      : Date, format: NA NA NA ...
 $ Opponent  : chr  "Orlando" "San Antonio" "Atlanta" "Indiana" ...
 $ Home      : int  0 1 0 0 1 1 1 1 0 0 ...

用了这个代码之后fulldata$Date <- as.Date(fulldata$Date, "%e-%b")，好像识别不出来，都是NA了？
帮忙看一下，谢谢~