```ruby
namespace :signers do
  namespace :export do

    # Usage: rake signers:export:icla after="#{date after which to find new ICLA signers}"
    desc 'Given a date, export as CSV ICLA signatures from users after that date'
    task icla: :environment do
      date = Time.zone.parse(ENV['date'])
      puts IclaSignature.earliest.where('signed_at > ?', date).as_csv
    end

    # Usage: rake signers:export:ccla after="#{date after which to find new CCLA signers}"
    desc 'Given a date, export as CSV CCLA signatures from organizations after that date'
    task ccla: :environment do
      date = Time.zone.parse(ENV['date'])
      puts CclaSignature.earliest_by_user.where('signed_at > ?', date).as_csv
    end
  end
end
```

Include default start date and chrono sort in CLA export rake tasks
user
```ruby
namespace :signers do
  namespace :export do

    # Usage: rake signers:export:icla after="#{date after which to find new ICLA signers}"
    desc 'Given a date, export as CSV ICLA signatures from users after that date'
    task icla: :environment do
      date = Time.zone.parse(ENV['date'] || '1970-01-01')
      puts IclaSignature.earliest.where('signed_at > ?', date).chronological.as_csv
    end

    # Usage: rake signers:export:ccla after="#{date after which to find new CCLA signers}"
    desc 'Given a date, export as CSV CCLA signatures from organizations after that date'
    task ccla: :environment do
      date = Time.zone.parse(ENV['date'] || '1970-01-01')
      puts CclaSignature.earliest_by_user.where('signed_at > ?', date).chronological.as_csv
    end
  end
end
```
assistant