'Sorting paragraphs in bash (awk or sed)?

To sort various paragraphs (abc order) I tried:

awk 'BEGIN { RS="" } { a[FNR]=$0 } END { PROCINFO["sorted_in"]="@val_str_asc" for (i in a) print a[i] ORS } ' myrecords.txt

But it won't sort. Sample records:

Ham  
this is good  
(mind the mail)

Cheese  
I'm fine

Turkey
(empty)

Blocks of text might got one or more lines, seperated by one or more blank lines or even a date instead of a blank. The latter can be solved by replacing the date with a blank line.

Desired result:

Cheese
I'm fine

Ham 
this is good 
(mind the mail)

Turkey 
(empty)
bashawk


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