typos

docs/preface/terminology.md

@@ -30,7 +30,7 @@ Due to politics a city may change its offset at any time (1). And for economic r
 1. This means some points in time don't exist in certain countries or exist twice.
 2. Usually they increase/decrease their offset by 1 or 2 hours.
 
-Because asking the offset for a timezone will yeild different results depending on when you ask for it, it's part of the world that changes. This means that timezones are handled at the [clock](#clock) level.
+Because asking the offset for a timezone will yield different results depending on when you ask for it, it's part of the world that changes. This means that timezones are handled at the [clock](#clock) level.
 
 ## Period
 

docs/upgrade/v3-to-v4.md

@@ -81,7 +81,7 @@ These are the main changes, for an extensive list of changes go to the [changelo
     $clock->now()->timezone()->minutes();
     ```
 
-=== "Before"
+=== "After"
     ```php
     $clock->now()->offset()->hours();
     $clock->now()->offset()->minutes();
@@ -94,7 +94,7 @@ These are the main changes, for an extensive list of changes go to the [changelo
     $clock->now()->changeTimezone(new Earth\Timezone\UTC(2, 0));
     ```
 
-=== "Before"
+=== "After"
     ```php
     $clock->now()->changeOffset(Offset::plus(2, 0));
     ```