diff --git a/lib/cycle.js b/lib/cycle.js
index f60a74f321d040e9937f7726d995ba24cbdec651..70401d5baa4755f5a4539092eae94f470e34bb37 100644
--- a/lib/cycle.js
+++ b/lib/cycle.js
@@ -1,6 +1,6 @@
 import * as joda from 'js-joda'
 const LocalDate = joda.LocalDate
-
+const DAYS = joda.ChronoUnit.DAYS
 
 export default function config(opts) {
   let bleedingDaysSortedByDate
@@ -28,28 +28,31 @@ export default function config(opts) {
         return day
       })
 
-    const firstBleedingDayBeforeTargetDayIndex = withWrappedDates.findIndex(day => {
+    const firstBleedingBeforeTargetDayIndex = withWrappedDates.findIndex(day => {
       return (
         day.wrappedDate.isEqual(targetDate) ||
         day.wrappedDate.isBefore(targetDate)
       )
     })
 
-    if (firstBleedingDayBeforeTargetDayIndex < 0) {
+    if (firstBleedingBeforeTargetDayIndex < 0) {
       withWrappedDates.forEach(day => delete day.wrappedDate)
       return null
     }
 
-    const previousBleedingDays = withWrappedDates.slice(firstBleedingDayBeforeTargetDayIndex)
+    const prevBleedingDays = withWrappedDates.slice(firstBleedingBeforeTargetDayIndex)
 
-    const lastMensesStart = previousBleedingDays.find((day, i) => {
-      return thereIsNoPreviousBleedingDayWithinTheThreshold(day, previousBleedingDays.slice(i + 1))
+    const lastMensesStart = prevBleedingDays.find((day, i) => {
+      return noBleedingDayWithinThreshold(day, prevBleedingDays.slice(i + 1))
     })
 
-    function thereIsNoPreviousBleedingDayWithinTheThreshold(bleedingDay, previousBleedingDays) {
-      const periodThreshold = bleedingDay.wrappedDate.minusDays(maxBreakInBleeding + 1)
+    function noBleedingDayWithinThreshold(day, previousBleedingDays) {
+      const periodThreshold = day.wrappedDate.minusDays(maxBreakInBleeding + 1)
       return !previousBleedingDays.some(({ wrappedDate }) => {
-        return wrappedDate.equals(periodThreshold) || wrappedDate.isAfter(periodThreshold)
+        return (
+          wrappedDate.equals(periodThreshold) ||
+          wrappedDate.isAfter(periodThreshold)
+        )
       })
     }
 
@@ -66,9 +69,11 @@ export default function config(opts) {
         return day
       })
 
-    const firstBleedingDayAfterTargetDay = withWrappedDates.reverse().find(day => {
-      return day.wrappedDate.isAfter(targetDate)
-    })
+    const firstBleedingDayAfterTargetDay = withWrappedDates
+      .reverse()
+      .find(day => {
+        return day.wrappedDate.isAfter(targetDate)
+      })
 
     withWrappedDates.forEach(day => delete day.wrappedDate)
 
@@ -80,7 +85,7 @@ export default function config(opts) {
     if (!lastMensesStart) return null
     const targetDate = LocalDate.parse(targetDateString)
     const lastMensesLocalDate = LocalDate.parse(lastMensesStart.date)
-    const diffInDays = lastMensesLocalDate.until(targetDate, joda.ChronoUnit.DAYS)
+    const diffInDays = lastMensesLocalDate.until(targetDate, DAYS)
 
     // cycle starts at day 1
     return diffInDays + 1
@@ -100,7 +105,11 @@ export default function config(opts) {
   function getPreviousCycle(dateString) {
     const startOfCycle = getLastMensesStart(dateString)
     if (!startOfCycle) return null
-    const dateBeforeStartOfCycle = LocalDate.parse(startOfCycle.date).minusDays(1).toString()
+    const dateBeforeStartOfCycle = LocalDate
+      .parse(startOfCycle.date)
+      .minusDays(1)
+      .toString()
+
     return getCycleForDay(dateBeforeStartOfCycle)
   }