diff --git a/client/src/hooks/useSchedule.ts b/client/src/hooks/useSchedule.ts
index 52a0d1c1..1f4c8cde 100644
--- a/client/src/hooks/useSchedule.ts
+++ b/client/src/hooks/useSchedule.ts
@@ -6,7 +6,7 @@ import UserDataContext from '../contexts/UserDataContext';
 import AlternatesContext, {Alternates} from '../contexts/AlternatesContext';
 
 // Utils
-import {getSchedule} from '@watt/shared/util/schedule';
+import {getUserSchedule} from '@watt/shared/util/schedule';
 import {SCHOOL_END_EXCLUSIVE, PeriodObj} from '@watt/shared/data/schedule';
 
 
@@ -24,14 +24,9 @@ export function useSchedule(date: DateTime) {
     const altFormat = localizedDate.toFormat('MM-dd');
 
     useEffect(() => {
-        const {periods, alternate} = getSchedule(date, alternates);
-
-        setPeriods(periods && periods.filter(({n, grades}) => {
-            if (n === '0' && !userData.options.period0) return false;
-            if (n === '8' && !userData.options.period8) return false;
-            if (grades && userData.gradYear) return grades.includes(12 - (userData.gradYear - SCHOOL_END_EXCLUSIVE.year));
-            return true;
-        }));
+        const {periods, alternate} = getUserSchedule(userData, date, alternates);
+
+        setPeriods(periods || null);
         setAlternate(alternate);
 
         return function cleanup() {
diff --git a/client/src/util/sgyPeriodFunctions.ts b/client/src/util/sgyPeriodFunctions.ts
index c1670a01..ecbfa256 100644
--- a/client/src/util/sgyPeriodFunctions.ts
+++ b/client/src/util/sgyPeriodFunctions.ts
@@ -1,7 +1,7 @@
 import {DateTime} from 'luxon';
 import { UserData } from '../contexts/UserDataContext';
 import {Alternates} from '../contexts/AlternatesContext';
-import { getSchedule } from '@watt/shared/util/schedule';
+import { getSchedule, getUserSchedule } from '@watt/shared/util/schedule';
 import { SCHOOL_END_EXCLUSIVE, SCHOOL_START } from '@watt/shared/data/schedule';
 
 
@@ -86,27 +86,22 @@ export function nextSchoolDay(userData: UserData, alternates: Alternates['altern
     let now = DateTime.now();
 
     while (true) {
+        now = now.plus({day: 1}); // increment day
+
         if (now > SCHOOL_END_EXCLUSIVE) break;
 
-        const sched = getSchedule(now, alternates).periods;
-        if (sched) {
-            const periods = sched.filter(({n}) => {
-                if (n === '0' && !userData.options.period0) return false;
-                if (n === '8' && !userData.options.period8) return false;
-                return true;
-            });
+        const {periods} = getUserSchedule(userData, now, alternates);
+        if (periods) {
             const end = periods[periods.length - 1].e;
             // console.log(now.clone().startOf('day').add(end, 'minutes').format('MMMM Do hh:mm:ss'));
             // console.log(moment().isAfter(now.clone().startOf('day').add(end, 'minutes')))
             if (DateTime.now() <= now.startOf('day').plus({minute: end})) break;
         }
-
-        now = now.plus({day: 1}); // increment day
     }
 
     if (now > SCHOOL_END_EXCLUSIVE) return null;
 
-    const p = getSchedule(now, alternates).periods![0];
+    const p = getUserSchedule(userData, now, alternates).periods![0];
     if (p) {
         const t = p.s;
         const m = t % 60;
diff --git a/shared/util/schedule.ts b/shared/util/schedule.ts
index 0fafd9e2..76d4dca0 100644
--- a/shared/util/schedule.ts
+++ b/shared/util/schedule.ts
@@ -1,5 +1,6 @@
 import {DateTime} from 'luxon';
 import {Alternates} from '@watt/client/src/contexts/AlternatesContext';
+import {UserData} from '@watt/client/src/contexts/UserDataContext';
 import schedule, {SCHOOL_START, SCHOOL_END, SCHOOL_END_EXCLUSIVE, PeriodObj} from '../data/schedule';
 
 
@@ -33,6 +34,21 @@ export function getSchedule(date: DateTime, alternates: Alternates['alternates']
     return {periods, alternate};
 }
 
+// Filters `periods` from `getSchedule()` to apply to the given `UserData`
+export function getUserSchedule(userData: UserData, date: DateTime, alternates: Alternates['alternates']) {
+    const schedule = getSchedule(date, alternates);
+    const {alternate} = schedule
+
+    const periods = schedule.periods?.filter(({n, grades}) => {
+        if (n === '0' && !userData.options.period0) return false;
+        if (n === '8' && !userData.options.period8) return false;
+        if (grades && userData.gradYear) return grades.includes(12 - (userData.gradYear - SCHOOL_END_EXCLUSIVE.year));
+        return true;
+    });
+
+    return {periods, alternate};
+}
+
 // Returns the next and previous period and information relevant for displaying them. Returns the next period or null
 // if there is none, the previous period or null if there is none, the minutes the next period starts in (or 0 if none),
 // the minutes the next period ends in (or 0 if none), the seconds left in the current minute, and the current minutes