Russia, three time zones meet during Finland's winter time: Central European Time (UTC+01:00) in Norway, Eastern European Time (UTC+02:00) in Finland, and Moscow Time (UTC+03:00) in Russia. Maintenance The VTT Technical Research Centre of Finland and the Centre for Metrology and Accreditation are responsible for implementing leap seconds to Finland's time zone, following the International Bureau of Weights and Measures as defined by the International Telecommunication Union. Finland adopted Coordinated Universal Time (UTC) in 1972 in order to implement these leap seconds and remain in the correct atomic time of Earth's rotation. Since Finland's first leap second occurred on 30 June 1972, 28 more have been implemented – occurring on either 30 June or 31 December – the latest occurring on 31 December 2016. VTT also transmits a high-precision time signal produced by six atomic clocks that maintain Finland's official time zone at a frequency of 25 megahertz to make sure the official timekeeping devices in Finland do not fall behind. Since the end of 2009, VTT's official time has remained within 30 nanoseconds of UTC. Furthermore, VTT is also responsible for clock synchronisation on computer networks connected via the Internet, relying on the Network Time Protocol (NTP), which is supported by the Ministry of Finance, and takes time directly from other external sources, either GPS, an atomic clock or a BIOS clock. Though the protocol is designed to account for variable latency between networks, the accuracy of time synchronisation ultimately still depends on a network's internet connection speed and bandwidth. As an example, VTT noted that a network connection at a speed of 100 Mbit/s results in a 0.0001 second delay between the official time of Finland and that of what is displayed on a computer. The accuracy worsens with slower connection speeds and delayed bandwidth. Notation In Finnish writing, the 24-hour clock notation is used. A baseline dot is used as the standardised and recommended separator between the hour and the minute ( "15.07" or "8.27"). The use of a colon is also common especially in relation to telecommunications and digital clocks, but is not recommended in normal text. Midnight is written as "24.00". The notation for times within the first hour of the day starts with one zero ( "0.15"). Leading zeros are not used ( no "09"). If greater accuracy is needed, seconds are added using the same symbol as the one used to separate the