diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f96a52..e72e4a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,3 +5,12 @@ All notable changes to this project will be documented in this file.
 ## [1.0.0] - 2023-11-11
 
 - Initial release
+
+## [1.1.0] - 2023-11-11
+
+- Unignored "dist" folder in git (major)
+
+## [1.2.1] - 2023-11-12
+
+- Moved timezone to main args and changed default behavior (major)
+- Updated test cases and readme to reflect new usage (minor)
diff --git a/README.md b/README.md
index 368e86f..9ff5b58 100644
--- a/README.md
+++ b/README.md
@@ -13,19 +13,47 @@ npm install nrel-spa
 Basic usage examples:
 
 ```javascript
-const { calcSpa } = require('nrel-spa');
+const { getSpa, calcSpa } = require('./index');
 
-const myLat = 40.7128; // Latitude for New York City
-const myLng = -74.006; // Longitude for New York City
-const myDate = new Date(); // Current date
+const date = new Date();
+console.log(date)
 
-const solarData = calcSpa(myDate, myLat, myLng);
-console.log(solarData);
+// NYC - minimum params
+const city = "New York"
+const lat = 40.7128;
+const lng = -74.006;
+const tz = null     // optional
+const params = null // optional
+const angles = []   // optional
+
+/* Jakarta - all params
+const city = "Jakarta"
+const lat = -6.2088
+const lng = 106.8456
+const tz = 0
+const elevation = 18
+const temperature = 26.56
+const pressure = 1017
+const params = {elevation, temperature, pressure}
+const angles = [63.435] */
+
+// Get results
+const get = getSpa(date, lat, lng); // minimum args
+const calc = calcSpa(date, lat, lng, tz, params, angles);
+
+// Print results
+console.log(`\nTest: ${city} with current Date():\n`)
+console.log("getSpa =", get, "\n");
+console.log("calcSpa =", calc, "\n");
 ```
 
 ## API
 
-Describe the functions and their parameters briefly.
+Exporting getSpa, calcSpa, and fractalTime.  Only date, lat, lng are required but if timezone (tz) is null, will return in UTC.
+
+- getSpa(date, lat, lng, tz, params, angles) // returns SPA results in fractal times
+- getSpa(date, lat, lng, tz, params, angles) // returns SPA results in formatted times
+- fractalTime(fractionalHour) // formats time from 10.767407706732804 to 10:46:02.667
 
 ## Contributing
 
diff --git a/index.js b/index.js
index 7dbcc4a..4cb200c 100644
--- a/index.js
+++ b/index.js
@@ -18,7 +18,7 @@ function adjustForCustomAngle(baseSpaData, zenithAngle) {
     return adjustedData;
 }
 
-function getSpa(date, lat, lng, tz, params = null, angles = []) {
+function getSpa(date, lat, lng, tz = 0, params = null, angles = []) {
     let data = new spa.SpaData();
     data.year = date.getFullYear();
     data.month = date.getMonth() + 1; // JavaScript months are 0-indexed
@@ -64,7 +64,7 @@ function getSpa(date, lat, lng, tz, params = null, angles = []) {
     return output;
 }
 
-function calcSpa(date, lat, lng, tz, params = null, angles = []) {
+function calcSpa(date, lat, lng, tz = 0, params = null, angles = []) {
     let rawData = getSpa(date, lat, lng, tz, params, angles);
     rawData.sunrise = fractalTime(rawData.sunrise);
     rawData.solarNoon = fractalTime(rawData.solarNoon);
diff --git a/package.json b/package.json
index a32c0b3..5e61399 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nrel-spa",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "NREL SPA native implementation in JS",
   "main": "index.js",
   "scripts": {
diff --git a/test.js b/test.js
index c3ffe54..0892d57 100644
--- a/test.js
+++ b/test.js
@@ -16,7 +16,7 @@ const angles = []
 const city = "Jakarta"
 const lat = -6.2088
 const lng = 106.8456
-const tz = 7
+const tz = 0
 const elevation = 18
 const temperature = 26.56
 const pressure = 1017