A @dfn{calendar date item} specifies a day of the year. It is
specified differently, depending on whether the month is specified
-numerically or literally. All these strings specify the same calendar date:
+numerically or literally. All these strings specify the same calendar date:
@example
1970-9-17 # ISO 8601.
@var{day} is a number between 1 and 31. If @var{year} is less than 100,
then 1900 is added to it to force a date in this century. The construct
@samp{@var{month}/@var{day}/@var{year}}, popular in the United States,
-is accepted. Also @samp{@var{month}/@var{day}}, omitting the year.
+is accepted. Also @samp{@var{month}/@var{day}}, omitting the year.
@cindex month names in date strings
@cindex abbreviations for months
@cindex displacement of dates
@dfn{Relative items} adjust a date (or the current date if none) forward
-or backward. The effect of relative items accumulate. Here are some
+or backward. The effects of relative items accumulate. Here are some
examples:
@example