diff --git a/datetimes.Rmd b/datetimes.Rmd
index 332b304..419a549 100644
--- a/datetimes.Rmd
+++ b/datetimes.Rmd
@@ -61,7 +61,7 @@ They work as follows.
 
 ### From strings
 
-Date/time data often comes as strings. You've seen one approach to parsing strings into date-times in [date-times](#readr-datetimes). Another approach is to use the helpers provided by lubridate. They automatically work out the format once you specify the order of the component. To use them, identify the order in which year, month, and day appears in your dates, then arrange "y", "m", and "d" in the same order. That gives you the name of the lubridate function that will parse your date. For example:
+Date/time data often comes as strings. You've seen one approach to parsing strings into date-times in [date-times](#readr-datetimes). Another approach is to use the helpers provided by lubridate. They automatically work out the format once you specify the order of the component. To use them, identify the order in which year, month, and day appear in your dates, then arrange "y", "m", and "d" in the same order. That gives you the name of the lubridate function that will parse your date. For example:
 
 ```{r}
 ymd("2017-01-31")