Why does javascript have a unique object type for dates?

How would you change values in a dictionary in a loop format for eg if you had to add the string "str' to all values against their keys. Would you still use for each method and just create a new method and invoke that inside another method you create for the updated dictionary. Sorry if this is confusing, Im trying to think of how we navigate such a problem in python and if javascript handles it similarly. Thankyou!



weekdays.splice(2,1,"Odin's Day"); what does the one indicate ? Odin's day replaces third element, but what does 1 mean?

Can both String() and toFixed be used in turn a number into string? What's the difference between them? Thank you!

I'm confused about question 4--aren't person1.age and person1[age] equivalent?

In what case we would not know the names of the properties? / In the Unknown Properties section of the reading, you say "The expression p1[k] means to look up a key in the dictionary in p1 where the name of the key is in the variable k", but where is the variable k? Was it ever initialized? Just not sure where the k is coming from.

when to use unknown properties

Just wanna say hi and thanks

"var dateObj2 = new Date(); 
This creates a variable called dateObj2, how is it different from ""Object""? I'm a bit confused by how this resembles Java but not exactly the same. Why is ""Date"" an object but not dateObj2? 
When we're invoking methods e.g. dateObj2.getFullYear() , does it mean that we call methods on the variable dateObj2?
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