just add data loader here

data_loader/src/septa_json/schedule_day.rs

@@ -0,0 +1,18 @@
+use std::collections::{BTreeMap, HashMap, HashSet};
+
+use crate::traits::*;
+use serde::{Deserialize, Serialize};
+
+
+#[derive(Default, Debug, Serialize, Deserialize)]
+pub struct ScheduleDay {
+    pub release_name: String,
+    pub special: bool, 
+    pub service_id: Vec<String>,
+    pub service_added: Vec<String>,
+    pub service_removed: Vec<String>
+}
+
+pub type Calendar = BTreeMap<String, ScheduleDay>;
+
+impl SeptaJson for Calendar {}