X-Git-Url: https://git.madduck.net/etc/awesome.git/blobdiff_plain/86473212afa1a64fa691d4562902e916538dd47a..7fe56712a4d4338cfb23d13e1ec3c6264a3e450e:/doc/index.md

diff --git a/doc/index.md b/doc/index.md
index 6c08c24..d12f09b 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -14,13 +14,17 @@ Returns the current unix timestamp using the most accurate source available.
 See `gettime` for more information.
 
 
-## `get_tz ( timezone_name )`
+## `get_tz ( [timezone_name] )`
 
 Returns a timezone object (see `tzinfo` documentation) for the given `timezone_name`.
-This uses the local zoneinfo database; names are usually of the form `Country/Largest_City`.
+If `timezone_name` is `nil` then the local timezone is used.
+
+This uses the local [zoneinfo database](https://www.iana.org/time-zones); 
+names are usually of the form `Country/Largest_City` e.g. "America/New_York".
+Check [wikipedia](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) for an example list.
 
 
 ## `time_in ( timezone_name [, utc_ts] )`
 
-Returns the current time in seconds since 1970-01-01 0:00:00 in the given timezone
-(as a string, e.g. "America/New_York") at the given UTC time (defaults to now).
+Returns the current time in seconds since 1970-01-01 0:00:00 in the given timezone as a string,
+(same semantics as `get_tz`) at the given UTC time (defaults to now).