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.....................................................................................................................................--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Is <tt>jd</tt> a valid Julian Day Number?
- !ruby/struct:SM::Flow::P 
  body: If it is, returns it. In fact, any value is treated as a valid Julian Day Number.
full_name: Date::valid_jd?
is_singleton: true
name: valid_jd?
params: (jd, sg=ITALY)
visibility: public