# [Perl 6], 91 bytes

<!-- language-all: lang-perl6 -->

    .put for (("[@]"if Date.today~~/12.(0?<{^26}>)$/),"[ ]"xx$0,+$0^..25)[*;*].pick(*).rotor(5)

[Try it online!][TIO-k46c4fhw]

[Perl 6]: https://github.com/nxadm/rakudo-pkg
[TIO-k46c4fhw]: https://tio.run/##K0gtyjH7/1@voLREIS2/SEFDQynaIVYpM03BJbEkVa8kPyWxsq5O39BIT8PA3qY6zsis1k5TRV9TRylaIVapokLFQEdbxSBOT8/IVDNay1orVq8gMzlbQ0tTryi/JL9Iw1Tz/38A "Perl 6 – Try It Online"


### Explanation:

~~~
.put for (     ...    )         # Print for each of
          ("[@]"if Date.today~~/12.(0?<{^26}>)$/), # [@] if today is within the Christmas period
         "[ ]"xx$0,      # As many [ ]s as the current date
         +$0^..25        # All the number from today to the 25th
                      [*;*]                  # Flatten
                           .pick(*)          # Randomise
                                   .rotor(5) # Split into chunks of 5
~~~