diff --git a/tools/selloutTime.js b/tools/selloutTime.js
new file mode 100644
index 00000000..c5d5ac0b
--- /dev/null
+++ b/tools/selloutTime.js
@@ -0,0 +1,355 @@
+const AWS = require('aws-sdk');
+const { dynamodb, TABLE_NAME, getParks, getFacilities } = require('./lambda/dynamoUtil');
+// Install inquirer @v8.0.0 to avoid EMCAScript error
+const inquirer = require('inquirer');
+const { DateTime, Interval, Duration } = require('luxon');
+const { cancel } = require('aws-crt');
+const { sk } = require('date-fns/locale');
+const fs = require('fs');
+
+async function run() {
+  console.log('*** Check pass sellout time ***');
+  try {
+
+    // Get facility
+    let facility = await getFacility();
+    // Get date
+    let date = await getDate();
+    // Get pass type
+    let passType = await getPassType(facility);
+
+    // Get reservation obj
+    let reservation = await getReservation(facility, date);
+    // run calcuation
+    if (!reservation.Count) {
+      throw new Error(`No reservations found for ${date} at ${facility.name}`);
+    }
+
+    // Unmarshall the reservation object
+    reservation = reservation.Items.map((item) => AWS.DynamoDB.Converter.unmarshall(item));
+
+    // Get passes
+    let passes = await getPasses(facility, date, passType);
+
+    // Sort passes by status
+    let passStatuses = sortPassesByStatus(passes.Items);
+
+    // If the facility is fully booked, the sellout time is the time the last reserved pass WAS CREATED, not committed.
+    const allPasses = passes.Items.map((pass) => AWS.DynamoDB.Converter.unmarshall(pass));
+    let count = [...allPasses].reduce((acc, pass) => acc + pass.numberOfGuests, 0);
+
+    // Sort passes by creation time
+    let sortedPasses = sortByCreatedTime(allPasses);
+
+    // Create capacity change event array
+    const events = createCapacityChangeEventArray(sortedPasses);
+
+    // Estimate sellout time
+    const selloutTime = estSelloutTime(events, passType, reservation[0]);
+    showPassBreakdown(passStatuses, selloutTime, facility, passType, date, events);
+
+  } catch (error) {
+    console.log('error:', error);
+  }
+
+}
+
+/**
+ * Retrieves the facility information by prompting the user to select a facility.
+ *
+ * @returns {Promise<Object>} A promise that resolves to the selected facility object.
+ * @throws {Error} If there is an error selecting the facility.
+ */
+async function getFacility() {
+  let facilities = [];
+  const parks = await getParks();
+  for (const park of parks) {
+    const parkFacilities = await getFacilities(park.orcs);
+    facilities = facilities.concat(parkFacilities);
+  }
+  let facility;
+  try {
+    facility = await inquirer.prompt([
+      {
+        type: 'list',
+        name: 'facility',
+        message: 'Select facility:',
+        choices: facilities.map(facility => {
+          return {
+            name: facility.name,
+            value: {
+              pk: facility.pk,
+              sk: facility.sk,
+              name: facility.name,
+              passTypes: Object.keys(facility.bookingTimes)
+            }
+          };
+        })
+      }
+    ]);
+    return facility.facility;
+  } catch (error) {
+    throw new Error('Error selecting facility:', error);
+  }
+}
+
+/**
+ * Retrieves a valid date from the user.
+ * @returns {Promise<string>} The selected date in the format 'YYYY-MM-DD'.
+ * @throws {Error} If there is an error selecting the date.
+ */
+async function getDate() {
+  let date;
+  try {
+    while (!date || date.invalid) {
+      userDate = await inquirer.prompt([
+        {
+          type: 'input',
+          name: 'date',
+          message: 'Enter date (YYYY-MM-DD):'
+        }
+      ]);
+      date = DateTime.fromFormat(userDate.date, 'yyyy-LL-dd').setZone('America/Vancouver');
+      console.log('date:', date);
+      if (date.invalid) {
+        console.log('Invalid date. Please try again.');
+      }
+    }
+    return userDate.date;
+  } catch (error) {
+    throw new Error('Error selecting date:', error);
+  }
+}
+
+/**
+ * Retrieves the pass type for a given facility.
+ *
+ * @param {Object} facility - The facility object.
+ * @returns {Promise<string>} - The selected pass type.
+ * @throws {Error} - If there is an error selecting the pass type.
+ */
+async function getPassType(facility) {
+  let passType;
+  console.log('facility.passTypes:', facility.passTypes);
+  try {
+    passType = await inquirer.prompt([
+      {
+        type: 'list',
+        name: 'passType',
+        message: 'Select pass type:',
+        choices: facility.passTypes
+      }
+    ]);
+    return passType.passType;
+  } catch (error) {
+    throw new Error('Error selecting passtype:', error);
+  }
+}
+
+/**
+ * Retrieves a reservation object for a given facility and date.
+ * @param {Object} facility - The facility object.
+ * @param {string} date - The date of the reservation.
+ * @returns {Promise<Object>} - A promise that resolves to the reservation object.
+ * @throws {Error} - If there is an error getting the reservation object.
+ */
+async function getReservation(facility, date) {
+  let orcs = facility.pk.split('::')[1];
+  const query = {
+    TableName: TABLE_NAME,
+    KeyConditionExpression: 'pk = :pk AND sk = :sk',
+    ExpressionAttributeValues: {
+      ':pk': { S: `reservations::${orcs}::${facility.sk}` },
+      ':sk': { S: date }
+    }
+  };
+  try {
+    const reservation = await dynamodb.query(query).promise();
+    return reservation;
+  } catch (error) {
+    throw new Error('Error getting reservation object:', error);
+  }
+}
+
+/**
+ * Retrieves passes from the database based on the specified facility, date, and pass type.
+ * @param {Object} facility - The facility object containing the facility name.
+ * @param {string} date - The date in string format.
+ * @param {string} passType - The type of pass.
+ * @returns {Promise<Object>} - A promise that resolves to the passes retrieved from the database.
+ * @throws {Error} - If there is an error collecting passes from the database.
+ */
+async function getPasses(facility, date, passType) {
+  const query = {
+    TableName: TABLE_NAME,
+    IndexName: 'manualLookup-index',
+    KeyConditionExpression: 'shortPassDate = :date AND facilityName = :facility',
+    ExpressionAttributeNames: {
+      '#type': 'type'
+    },
+    FilterExpression: '#type = :type',
+    ExpressionAttributeValues: {
+      ':date': { S: date },
+      ':facility': { S: facility.name },
+      ':type': { S: passType }
+    }
+  };
+  try {
+    const passes = await dynamodb.query(query).promise();
+    return passes;
+  } catch (error) {
+    throw new Error('Error collecting passes:', error);
+  }
+}
+
+/**
+ * Sorts an array of passes by their status.
+ *
+ * @param {Array} passes - The array of passes to be sorted.
+ * @returns {Object} - An object containing arrays of passes grouped by status.
+ */
+function sortPassesByStatus(passes) {
+  let statuses = {};
+  for (const pass of passes) {
+    if (!statuses[pass.passStatus.S]) {
+      statuses[pass.passStatus.S] = [];
+    }
+    statuses[pass.passStatus.S].push(AWS.DynamoDB.Converter.unmarshall(pass));
+  }
+  return statuses;
+}
+
+/**
+ * Sorts an array of passes by their creation date in ascending order.
+ *
+ * @param {Array} passes - The array of passes to be sorted.
+ * @returns {Array} - The sorted array of passes.
+ */
+function sortByCreatedTime(passes) {
+  let sortedPasses = passes.sort((a, b) => {
+    return a.creationDate.localeCompare(b.creationDate);
+  });
+  return sortedPasses;
+}
+
+/**
+ * Creates an array of capacity change events based on the given passes.
+ *
+ * @param {Array} passes - An array of passes.
+ * @returns {Array} - An array of capacity change events sorted by date.
+ */
+function createCapacityChangeEventArray(passes) {
+  const events = [];
+  for (const pass of passes) {
+    let auditTrail = pass.audit;
+    for (const auditEvent of auditTrail) {
+      if (auditEvent?.passStatus === 'cancelled') {
+        events.push({
+          date: auditEvent.dateUpdated,
+          sk: pass.sk,
+          passStatus: pass.passStatus,
+          auditStatus: auditEvent.passStatus,
+          numberOfGuests: pass.numberOfGuests,
+          change: -1 * pass.numberOfGuests
+        });
+      } else if (auditEvent?.passStatus === 'hold') {
+        events.push({
+          date: pass.creationDate,
+          sk: pass.sk,
+          passStatus: pass.passStatus,
+          auditStatus: auditEvent.passStatus,
+          numberOfGuests: pass.numberOfGuests,
+          change: pass.numberOfGuests
+        });
+      }
+    }
+  }
+  return events.sort((a, b) => a.date.localeCompare(b.date));
+}
+
+/**
+ * Estimates the sellout time based on the given events, facility, pass type, and reservation.
+ *
+ * @param {Array} events - The array of events.
+ * @param {string} passType - The pass type.
+ * @param {Object} reservation - The reservation object.
+ * @param {Object} reservation.capacities - The capacities object.
+ * @param {number} reservation.capacities.baseCapacity - The base capacity.
+ * @param {number} reservation.capacities.capacityModifier - The capacity modifier.
+ * @returns {Date|null} - The estimated sellout time or null if no sellout occurs.
+ */
+function estSelloutTime(events, passType, reservation) {
+  // Get capacity
+  const capacity = reservation.capacities[passType].baseCapacity + reservation.capacities[passType].capacityModifier;
+  let runningCapacity = capacity;
+  let selloutTime;
+  for (const event of events) {
+    runningCapacity -= event.change;
+    event.capacity = runningCapacity;
+    if (runningCapacity <= 0 && !selloutTime) {
+      selloutTime = event.date;
+    }
+  }
+  return selloutTime;
+}
+
+/**
+ * Displays the breakdown of passes and their statuses.
+ *
+ * @param {Object} passes - The passes object containing pass statuses.
+ * @param {string} selloutTime - The sellout time of the passes.
+ * @param {Object} facility - The facility object.
+ * @param {string} passType - The type of pass.
+ * @param {string} date - The date of the passes.
+ * @param {Object} events - The events object.
+ * @returns {Promise<void>} - A promise that resolves when the breakdown is displayed.
+ */
+async function showPassBreakdown(passes,  selloutTime, facility, passType, date, events) {
+  let statuses = {};
+  let total = 0;
+  for (const status of Object.keys(passes)) {
+    statuses[status] = passes[status].reduce((acc, pass) => acc + pass.numberOfGuests, 0);
+    total += statuses[status];
+  }
+  statuses['total'] = total;
+  console.log('************');
+  console.log(`${facility.name} (${passType}) on ${date}`);
+  console.log('statuses:', statuses);
+  if (selloutTime) {
+    const time = DateTime.fromISO(selloutTime).setZone('America/Vancouver');
+    const open = time.startOf('day').plus({ hours: 7 });
+    const interval = Interval.fromDateTimes(open, time);
+    const duration = interval.toDuration();
+    console.log(`Sold out at ${time.toFormat('HH:mm:ss')} (${duration.as('minutes')} minutes)`);
+  } else {
+    console.log('Not yet sold out.');
+  }
+  console.log('************');
+  let csv = await inquirer.prompt(
+    {
+      type: 'confirm',
+      name: 'csv',
+      message: 'Export breakdown as csv?:',
+    }
+  );
+  if (csv.csv) {
+    exportAsCsv(events, facility, passType, date);
+  }
+}
+
+function exportAsCsv(events, facility, passType, date){
+  let csv = 'date,sk,passStatus,auditStatus,numberOfGuests,change,capacity\n';
+  for (const event of events) {
+    csv += `${event.date},${event.sk},${event.passStatus},${event.auditStatus},${event.numberOfGuests},${event.change},${event.capacity}\n`;
+  }
+  fs.writeFile(`selloutTime_${facility.name}_${passType}_${date}.csv`, csv, (err) => {
+    if (err) {
+      console.log('err:', err);
+    }
+  })
+}
+
+// Avoid AWS SDK V2 warning text
+setTimeout(() => {
+  run();
+}, 500);
\ No newline at end of file