This is a simple bot (preferably) birthday calendar snippet where you can record your birthday and search for someone else's birthday. I searched and couldn't find one like this, so... On an actual birthday, your bot (or you) will wish said person a happy birthday. I'm pretty sure the joining part is very redundant, but after trying, I couldn't fix that. :/

Well, enjoy this 100% made-by-me script! Also, this script has been tested, but not a whole lot. IF you find any errors that I missed, be sure to tell me below. Oh, and to prevent any confusion, %c is a command identifier. Commonly used by prefabs like YourBot. Feel free to modify it if needed.

;birthday calendar scripting
on *:text:*setbday*:#:{
  if ($1 == %c $+ setbday) {
    if ($2 != $null) {
      if ($3 != $null) {
        if ($4 != $null) {
          set %bday. [ $+ [ $nick ] ] $2 $+ / $+ $3 $+ / $+ $4
          .notice $nick 10Your birthday has been logged as $2 $+ / $+ $3 $+ / $+ $4 $+ , $nick $+ .
        }
        else { .notice $nick 10Incorrect: use %c $+ setbday <date in 2 digits; first = 01> <month in 2 digits; April = 04> <year in 4 digits your next birthday is>. }
      }
      else { .notice $nick 10Incorrect: use %c $+ setbday <date in 2 digits; first = 01> <month in 2 digits; April = 04> <year in 4 digits your next birthday is>. }
    }
    else { .notice $nick 10Incorrect: use %c $+ setbday <date in 2 digits; first = 01> <month in 2 digits; April = 04> <year in 4 digits your next birthday is>. }
  }
}
on *:text:*bday*:#:{
  if ($1 == %c $+ bday) {
    if ($2 != $null) {
      if (%bday. [ $+ [ $2 ] ] != 0) {
        .notice $nick 10Birthday recorded for $2 $+ : %bday. [ $+ [ $2 ] ]
      }
      else { .notice $nick 10No birthday recorded for $2 $+ . }
    }
    else { .notice $nick 10Incorrect: use %c $+ bday <nick>. }
  }
}
on *:text:*calendarinfo*:#:{
  if ($1 == %c $+ calendarinfo) {
    .notice $nick 10To set your birthday, type %c $+ setbday <date in 2 digits; first = 01> <month in 2 digits; April = 04> <year in 4 digits your next birthday is>.
    .notice $nick 10To check someone else's birthday, type %c $+ bday <nick>.
    .notice $nick 10To review this list again, type %c $+ calendarinfo. $date
  }
}
on 1:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}
on 105!:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}
on 995!:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}
on 1000!:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}
on 1500!:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}
on 1600!:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}
on 2500!:JOIN:*:{
  if ($date == %bday. [ $+ [ $nick ] ]) {
    .notice $nick 10Happy birthday $nick $+ ! Make sure you reset your birthday, $nick $+ .
    .msg $chan It's $nick $+ 's birthday! Make sure you wish $nick a happy birthday! 
  }
}