diff --git a/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_DateTime.res b/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_DateTime.res
index 97d35c49..a0059392 100644
--- a/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_DateTime.res
+++ b/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_DateTime.res
@@ -11,8 +11,8 @@ let dateDispatch = (call: ExpressionValue.functionCall, env: DistributionOperati
     | Ok(t) => EvDate(t)->Ok->Some
     | Error(e) => RETodo(e)->Error->Some
     }
-  | ("fromMilliseconds", [EvNumber(f)]) => EvDate(E.Date.fromFloat(f))->Ok->Some
-  | ("toMilliseconds", [EvDate(f)]) => EvNumber(E.Date.toFloat(f))->Ok->Some
+  | ("dateFromNumber", [EvNumber(f)]) => EvDate(E.Date.fromFloat(f))->Ok->Some
+  | ("toNumber", [EvDate(f)]) => EvNumber(E.Date.toFloat(f))->Ok->Some
   | ("subtract", [EvDate(d1), EvDate(d2)]) =>
     switch E.Date.subtract(d1, d2) {
     | Ok(d) => EvTimeDuration(d)->Ok
@@ -31,24 +31,21 @@ let durationDispatch = (call: ExpressionValue.functionCall, _: DistributionOpera
   switch call {
   | ("toString", [EvTimeDuration(t)]) => EvString(E.Duration.toString(t))->Ok->Some
   | ("hours", [EvNumber(f)]) => EvTimeDuration(E.Duration.fromHours(f))->Ok->Some
+  | ("minutes", [EvNumber(f)]) => EvTimeDuration(E.Duration.fromMinutes(f))->Ok->Some
   | ("days", [EvNumber(f)]) => EvTimeDuration(E.Duration.fromDays(f))->Ok->Some
   | ("years", [EvNumber(f)]) => EvTimeDuration(E.Duration.fromYears(f))->Ok->Some
   | ("toHours", [EvTimeDuration(f)]) => EvNumber(E.Duration.toHours(f))->Ok->Some
+  | ("toMinutes", [EvTimeDuration(f)]) => EvNumber(E.Duration.toMinutes(f))->Ok->Some
   | ("toDays", [EvTimeDuration(f)]) => EvNumber(E.Duration.toDays(f))->Ok->Some
   | ("toYears", [EvTimeDuration(f)]) => EvNumber(E.Duration.toYears(f))->Ok->Some
-  | (
-      ("add" | "subtract" | "multiply" | "divide") as op,
-      [EvTimeDuration(d1), EvTimeDuration(d2)],
-    ) => {
-      let op = switch op {
-      | "subtract" => E.Duration.subtract
-      | "multiply" => E.Duration.multiply
-      | "divide" => E.Duration.divide
-      | "add"
-      | _ => E.Duration.add
-      }
-      EvTimeDuration(op(d1, d2))->Ok->Some
-    }
+  | ("add", [EvTimeDuration(d1), EvTimeDuration(d2)]) => 
+      EvTimeDuration(E.Duration.add(d1, d2))->Ok->Some
+  | ("subtract", [EvTimeDuration(d1), EvTimeDuration(d2)]) => 
+      EvTimeDuration(E.Duration.subtract(d1, d2))->Ok->Some
+  | ("multiply", [EvTimeDuration(d1), EvNumber(d2)]) => 
+      EvTimeDuration(E.Duration.multiply(d1, d2))->Ok->Some
+  | ("divide", [EvTimeDuration(d1), EvNumber(d2)]) => 
+      EvTimeDuration(E.Duration.divide(d1, d2))->Ok->Some
   | _ => None
   }
 }
diff --git a/packages/squiggle-lang/src/rescript/Utility/E.res b/packages/squiggle-lang/src/rescript/Utility/E.res
index 6a66e497..46787134 100644
--- a/packages/squiggle-lang/src/rescript/Utility/E.res
+++ b/packages/squiggle-lang/src/rescript/Utility/E.res
@@ -843,9 +843,11 @@ module Duration = {
   let year = Belt.Float.fromInt(24 * 60 * 60 * 1000) *. 365.25
   let fromFloat = (f: float): t => f
   let toFloat = (d: t): float => d
+  let fromMinutes = (h: float): t => h *. minute
   let fromHours = (h: float): t => h *. hour
   let fromDays = (d: float): t => d *. day
   let fromYears = (y: float): t => y *. year
+  let toMinutes = (t: t): float => t /. minute
   let toHours = (t: t): float => t /. hour
   let toDays = (t: t): float => t /. day
   let toYears = (t: t): float => t /. year
@@ -854,13 +856,14 @@ module Duration = {
     let shouldPluralize = f => f != 1.0
     let display = (f: float, s: string) =>
       `${Float.with3DigitsPrecision(f)} ${s}${shouldPluralize(f) ? "s" : ""}`
-    if t >= year {
+    let abs = Js.Math.abs_float(t)
+    if abs >= year {
       display(t /. year, "year")
-    } else if t >= day {
+    } else if abs >= day {
       display(t /. day, "day")
-    } else if t >= hour {
+    } else if abs >= hour {
       display(t /. hour, "hour")
-    } else if t >= minute {
+    } else if abs >= minute {
       display(t /. minute, "minute")
     } else {
       Float.toFixed(t) ++ "ms"
@@ -868,8 +871,8 @@ module Duration = {
   }
   let add = (t1: t, t2: t): t => t1 +. t2
   let subtract = (t1: t, t2: t): t => t1 -. t2
-  let multiply = (t1: t, t2: t): t => t1 *. t2
-  let divide = (t1: t, t2: t): t => t1 /. t2
+  let multiply = (t1: t, t2: float): t => t1 *. t2
+  let divide = (t1: t, t2: float): t => t1 /. t2
 }
 
 module Date = {