Added README and examples.

README.md

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+Calculates a date and types it into any program.
+
+Call this tool from a script using [Rofi](https://github.com/davatorium/rofi), [Dmenu](https://tools.suckless.org/dmenu/) or similar.
+
+Supported commands:
+  today
+  tomorrow
+  yesterday
+  daybeforeyesterday
+  dayaftertomorrow
+  next<weekday> (e.g. nextmonday)
+  last<weekday> (e.g. lastsaturday)

examples/blinddate.de.sh

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+#!/bin/sh
+
+cmd="$HOME/scripts/blinddate/target/release/blinddate"
+
+prompt="Tag"
+
+today="heute"
+tomorrow="morgen"
+yesterday="gestern"
+daybeforeyesterday="vorgestern"
+dayaftertomorrow="übermorgen"
+nextmonday="nächsten Montag"
+nexttuesday="nächsten Dienstag"
+nextwednesday="nächsten Mittwoch"
+nextthursday="nächsten Donnerstag"
+nextfriday="nächsten Freitag"
+nextsaturday="nächsten Samstag"
+nextsunday="nächsten Sonntag"
+lastmonday="letzten Montag"
+lasttuesday="letzten Dienstag"
+lastwednesday="letzten Mittwoch"
+lastthursday="letzten Donnerstag"
+lastfriday="letzten Freitag"
+lastsaturday="letzten Samstag"
+lastsunday="letzten Sonntag"
+
+day=$(echo "$today
+$tomorrow
+$yesterday
+$daybeforeyesterday
+$dayaftertomorrow
+$nextmonday
+$nexttuesday
+$nextwednesday
+$nextthursday
+$nextfriday
+$nextsaturday
+$nextsunday
+$lastmonday
+$lasttuesday
+$lastwednesday
+$lastthursday
+$lastfriday
+$lastsaturday
+$lastsunday" | rofi -dmenu -i -p "$prompt")
+
+case $day in
+    "$today")              "$cmd" today;;
+    "$tomorrow")           "$cmd" tomorrow;;
+    "$yesterday")          "$cmd" yesterday;;
+    "$daybeforeyesterday") "$cmd" daybeforeyesterday;;
+    "$dayaftertomorrow")   "$cmd" dayaftertomorrow;;
+    "$nextmonday")         "$cmd" nextmonday;;
+    "$nexttuesday")        "$cmd" nexttuesday;;
+    "$nextwednesday")      "$cmd" nextwednesday;;
+    "$nextthursday")       "$cmd" nextthursday;;
+    "$nextfriday")         "$cmd" nextfriday;;
+    "$nextsaturday")       "$cmd" nextsaturday;;
+    "$nextsunday")         "$cmd" nextsunday;;
+    "$lastmonday")         "$cmd" lastmonday;;
+    "$lasttuesday")        "$cmd" lasttuesday;;
+    "$lastwednesday")      "$cmd" lastwednesday;;
+    "$lastthursday")       "$cmd" lastthursday;;
+    "$lastfriday")         "$cmd" lastfriday;;
+    "$lastsaturday")       "$cmd" lastsaturday;;
+    "$lastsunday")         "$cmd" lastsunday;;
+esac

examples/blinddate.en.sh

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+#!/bin/sh
+
+cmd="$HOME/scripts/blinddate/target/release/blinddate"
+
+prompt="Day"
+
+today="today"
+tomorrow="tomorrow"
+yesterday="yesterday"
+daybeforeyesterday="day before yesterday"
+dayaftertomorrow="day after tomorrow"
+nextmonday="next Monday"
+nexttuesday="next Tuesday"
+nextwednesday="next Wednesday"
+nextthursday="next Thursday"
+nextfriday="next Friday"
+nextsaturday="next Saturday"
+nextsunday="next Sunday"
+lastmonday="last Monday"
+lasttuesday="last Tuesday"
+lastwednesday="last Wednesday"
+lastthursday="last Thursday"
+lastfriday="last Friday"
+lastsaturday="last Saturday"
+lastsunday="last Sunday"
+
+day=$(echo "$today
+$tomorrow
+$yesterday
+$daybeforeyesterday
+$dayaftertomorrow
+$nextmonday
+$nexttuesday
+$nextwednesday
+$nextthursday
+$nextfriday
+$nextsaturday
+$nextsunday
+$lastmonday
+$lasttuesday
+$lastwednesday
+$lastthursday
+$lastfriday
+$lastsaturday
+$lastsunday" | rofi -dmenu -i -p "$prompt")
+
+case $day in
+    "$today")              "$cmd" today;;
+    "$tomorrow")           "$cmd" tomorrow;;
+    "$yesterday")          "$cmd" yesterday;;
+    "$daybeforeyesterday") "$cmd" daybeforeyesterday;;
+    "$dayaftertomorrow")   "$cmd" dayaftertomorrow;;
+    "$nextmonday")         "$cmd" nextmonday;;
+    "$nexttuesday")        "$cmd" nexttuesday;;
+    "$nextwednesday")      "$cmd" nextwednesday;;
+    "$nextthursday")       "$cmd" nextthursday;;
+    "$nextfriday")         "$cmd" nextfriday;;
+    "$nextsaturday")       "$cmd" nextsaturday;;
+    "$nextsunday")         "$cmd" nextsunday;;
+    "$lastmonday")         "$cmd" lastmonday;;
+    "$lasttuesday")        "$cmd" lasttuesday;;
+    "$lastwednesday")      "$cmd" lastwednesday;;
+    "$lastthursday")       "$cmd" lastthursday;;
+    "$lastfriday")         "$cmd" lastfriday;;
+    "$lastsaturday")       "$cmd" lastsaturday;;
+    "$lastsunday")         "$cmd" lastsunday;;
+esac