Question: When do the new data protection laws come into effect?

Disambiguated questions and answers:
context: The GDPR was adopted on 14 April 2016, and became enforceable beginning 25 May 2018. As the GDPR is a regulation, not a directive, it is directly binding and applicable, but does provide flexibility for certain aspects of the regulation to be adjusted by individual member states.
question: When does the General Data Protection Regulation passed by the EU in 2016 come into effect?
short_answers: 25 May 2018
wikipage: General Data Protection Regulation

context: It's true that with the United Kingdom scheduled to leave the European Union, the UK granted royal assent to the "Data Protection Act 2018" on 23 May 2018, which contains equivalent regulations and protections. When the UK leaves the EU, it will become a "third country" for the purposes of the transfer of personal data outside the EU. This may require an "adequacy decision" by the European Commission on the suitability of the UK's data protection framework, or other appropriate safeguards that may allow such transfers to take place. (Chapter V). It is currently (August 2018) the UK Government's view that a 'legally-binding data protection agreement' between the EU and the UK would be more appropriate than an 'adequacy finding'. Such an agreement would include the UK Information Commissioner taking part in the 'one stop shop' mechanism and having a seat on the European Data Protection Board.
question: When do the Data protection Act 2018 of the UK come into effect?
short_answers: May 2018
wikipage: General Data Protection Regulation

context: On June 28, 2018 California legislature passed AB 375, the California Consumer Privacy Act of 2018, effective January 1, 2020. If the law is not amended before it becomes effective, The California Consumer Privacy Act, AB. 375 — gives California residents an array of new rights, starting with the right to be informed about what kinds of personal data companies have collected and why it was collected.
question: When does the California Consumer Privacy Act of 2018 come into effect?
short_answers: January 1, 2020
wikipage: Information privacy law

context: In Switzerland, the right to privacy is guaranteed in article 13 of the Swiss Federal Constitution. The Swiss Federal Data Protection Act (DPA) and the Swiss Federal Data Protection Ordinance (DPO) entered into force on July 1, 1993. The latest amendments of the DPA and the DPO entered into force on January 1, 2008.
question: When do the new amendments to the Swiss Federal Data Protection Act and the Swiss Federal Data Protection Ordinance come into effect?
short_answers: January 1, 2008
wikipage: Information privacy law

Long answers:
knowledge: content: The Swiss Federal Data Protection Act (DPA)[15] and the Swiss Federal Data Protection Ordinance (DPO) entered into force on July 1, 1993. The latest amendments of the DPA and the DPO entered into force on January 1, 2008.
wikipage: Information privacy law Switzerland

content: The Data Protection Act 2018 received royal assent on 23 May 2018.
wikipage: Data Protection Act 2018

content:  The CCPA became effective on January 1st, 2020.
wikipage: California Consumer Privacy Act

content: The GDPR was adopted on 14 April 2016 and became enforceable beginning 25 May 2018. 
wikipage: General Data Protection Regulation
long_answer: The Swiss Federal Data Protection Act (DPA) and the Swiss Federal Data Protection Ordinance (DPO) entered into force on July 1, 1993 and was amended on January 1, 2008.The General Data Protection Regulation was adopted in the EU on 14 April 2016, and became enforceable beginning 25 May 2018. The UK granted royal assent to the "Data Protection Act 2018" on 23 May 2018. The California legislature passed the California Consumer Privacy Act of 2018 which became effective January 1, 2020.