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diff --git a/wake.sh b/wake.sh
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+#/bin/sh
+
+
+# wake.sh [time]
+#
+# A script to play $SOUNDFILE (see below) at a time given as shell argument.
+# The format of this timestamp corresponds to whatever `date -d <format>`
+# accepts.
+#
+# See these examples:
+#
+# - ./wake.sh "tomorrow 6:15"    # wake up tomorrow
+# - ./wake.sh "5 minutes"        # 5 minute timer
+# - ./wake.sh "2059-03-08 9:30"  # reminder on a specific date and time
+#
+# See `man 1 date` for details.
+
+
+SOUNDFILE="${HOME}/wakeup-sound"
+
+
+time_str="$1"
+time_parsed="$(date -d "${time_str}")"
+time_unix="$(date -d "${time_str}" +%s)"
+now_unix="$(date +%s)"
+delta="$(((${time_unix}) - (${now_unix})))"
+
+echo "Alarm set to: ${time_parsed}"
+sleep "${delta}"
+mpv --no-video --no-resume-playback --really-quiet "${SOUNDFILE}"