Seed packet explanation needed

[Naz2001]

Hi,
I got these seed packets shipped from the Netherlands to my country, but I don't know what the figures in the black circles mean.
Can someone please explain them to me? I have looked for it online, but most of the seed packets I find have the explanation written out, instead of these symbols!
Please help!

 

[Owdboggy]

First one is when to sow.
Second one no idea.
Third one is the distance apart for t final planting.
Last one is when to harvest.

 

[marlingardener]

Could the second be days to germination?
Owdboggy, I am impressed with your interpretation of those symbols!

 

[Tetters]

It IS all written on the packet.... in Dutch, then French, English and German..... 1, Sow from mid March to early July 2, Thin out if necessary and keep soil moist at all times - etc etc..