diff --git a/src/clj_hl7_fhir/core.clj b/src/clj_hl7_fhir/core.clj
index e08ccf6..b47991f 100644
--- a/src/clj_hl7_fhir/core.clj
+++ b/src/clj_hl7_fhir/core.clj
@@ -56,7 +56,7 @@
     (str (:namespace value) "|" (format-search-value (:value value)))
 
     (instance? Date value)
-    (->iso-timestamp value)
+    (->timestamp value)
 
     :else
     (-> value str escape-parameter)))
diff --git a/src/clj_hl7_fhir/util.clj b/src/clj_hl7_fhir/util.clj
index 1a0b619..5f3029d 100644
--- a/src/clj_hl7_fhir/util.clj
+++ b/src/clj_hl7_fhir/util.clj
@@ -17,19 +17,19 @@
       (.setTimeZone df tz)
       (.format df date))))
 
-(defn ->iso-timestamp
+(defn ->timestamp
   "returns an ISO8601 formatted date/time string for the given date object"
   [^Date date]
   (format-date date iso8601-timestamp))
 
-(defn ->iso-local-timestamp
+(defn ->local-timestamp
   "returns an ISO8601 formatted date/time string for the given date object. the timestamp
    will not include any timezone information and so is appropriate for local timezone
    date/times only."
   [^Date date]
   (format-date date iso8601-timestamp))
 
-(defn ->iso-date
+(defn ->date
   "returns an ISO8601 formatted date string for the given date object"
   [^Date date]
   (format-date date iso8601-date))