diff --git a/README b/README
index a099036..ef10d59 100644
--- a/README
+++ b/README
@@ -1 +1,9 @@
-TBD
+This library contains four exported methods:
+
+* utc_to_local(DateTime, Timezone)
+* local_to_utc(DateTime, Timezone)
+* local_to_local(DateTime, TimezoneFrom, TimezoneTo)
+* tz_name(DateTime, Timezone)
+Where
+DateTime = {date(), time()}
+TimeZone(To, From) = String(). E.g. “Europe/Moscow”, “America/NewYork”
\ No newline at end of file