diff --git a/docs/_data/sidebars/mydoc_sidebar.yml b/docs/_data/sidebars/mydoc_sidebar.yml
index d528008..66a2366 100644
--- a/docs/_data/sidebars/mydoc_sidebar.yml
+++ b/docs/_data/sidebars/mydoc_sidebar.yml
@@ -203,6 +203,9 @@ entries:
       - title: Negative
         url: /tag_negative.html
         output: web
+      - title: Observation Period
+        url: /tag_observation_period.html
+        output: web
       - title: Patient Reported
         url: /tag_patient_reported.html
         output: web
@@ -230,9 +233,6 @@ entries:
       - title: Year of Birth
         url: /tag_year_of_birth.html
         output: web
-      - title: Observation Period
-        url: /tag_observation_period.html
-        output: web
 
 
   
\ No newline at end of file
diff --git a/docs/_data/tags.yml b/docs/_data/tags.yml
index f8977a3..c1a89c0 100644
--- a/docs/_data/tags.yml
+++ b/docs/_data/tags.yml
@@ -23,6 +23,4 @@ allowed-tags:
   - datetime
   - patient_reported
   - observation_period
-  - event 
-  - survival
 # Copyright 2021 Google LLC
diff --git a/docs/pages/general_conventions/events_with_no_exact_last_day.md b/docs/pages/observation_period/no_exact_last_op_day.md
similarity index 90%
rename from docs/pages/general_conventions/events_with_no_exact_last_day.md
rename to docs/pages/observation_period/no_exact_last_op_day.md
index 65cd3b3..ffbaf08 100644
--- a/docs/pages/general_conventions/events_with_no_exact_last_day.md
+++ b/docs/pages/observation_period/no_exact_last_op_day.md
@@ -1,11 +1,11 @@
 ---
 title: Resolving Observation Period End Date without Exact Information on a Last Day
-keywords: observation_period, event, survival
+keywords: observation period, survival, end date
 last_updated: April 30, 2024
-tags: [observation_period, event, survival]
+tags: [observation_period, dates]
 summary: "Resolving observation period end date without exact information on a last day"
 sidebar: mydoc_sidebar
-permalink: /events_with_no_exact_last_day.html
+permalink: /no_exact_last_op_day.html
 ---
 
 ## Issue # and location
diff --git a/docs/pages/observation_period/observation_period.md b/docs/pages/observation_period/observation_period.md
index 86eef73..d53c38f 100644
--- a/docs/pages/observation_period/observation_period.md
+++ b/docs/pages/observation_period/observation_period.md
@@ -2,7 +2,7 @@
 title: OBSERVATION_PERIOD
 keywords: observation_period, observation_end_date
 last_updated: May 04, 2024
-tags: [observation_period, event, survival]
+tags: [observation_period]
 summary: "Conventions related to mapping data into the OBSERVATION_PERIOD table."
 sidebar: mydoc_sidebar
 permalink: /observation_period.html
@@ -12,5 +12,5 @@ permalink: /observation_period.html
 
 | **Field** | **Convention** |
 |:--------|:-------|
-|  OBSERVATION_PERIOD_END_DATE  |  [Resolving Observation Period End Date without Exact Information on a Last Day](events_with_no_exact_last_day.html)  |
+|  OBSERVATION_PERIOD_END_DATE  |  [Resolving Observation Period End Date without Exact Information on a Last Day](no_exact_last_op_day.html)  |
 |=====
\ No newline at end of file