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diff --git a/app/src/main/kotlin/com/pitchedapps/frost/utils/TimeUtils.kt b/app/src/main/kotlin/com/pitchedapps/frost/utils/TimeUtils.kt
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+++ b/app/src/main/kotlin/com/pitchedapps/frost/utils/TimeUtils.kt
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+/*
+ * Copyright 2019 Allan Wang
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.pitchedapps.frost.utils
+
+import android.content.Context
+import ca.allanwang.kau.utils.string
+import com.pitchedapps.frost.R
+import java.text.DateFormat
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Date
+import java.util.Locale
+
+/**
+ * Converts time in millis to readable date,
+ * eg Apr 24 at 7:32 PM
+ *
+ * With regards to date modifications in calendars,
+ * it appears to respect calendar rules;
+ * see https://stackoverflow.com/a/43227817/4407321
+ */
+fun Long.toReadableTime(context: Context): String {
+    val cal = Calendar.getInstance()
+    cal.timeInMillis = this
+    val timeFormatter = SimpleDateFormat.getTimeInstance(DateFormat.SHORT)
+    val time = timeFormatter.format(Date(this))
+    val day = when {
+        cal >= Calendar.getInstance().apply { add(Calendar.DAY_OF_MONTH, -1) } -> context.string(R.string.today)
+        cal >= Calendar.getInstance().apply { add(Calendar.DAY_OF_MONTH, -2) } -> context.string(R.string.yesterday)
+        else -> {
+            val dayFormatter = SimpleDateFormat("MMM dd", Locale.getDefault())
+            dayFormatter.format(Date(this))
+        }
+    }
+    return context.getString(R.string.time_template, day, time)
+}