Thus, from 1912, after adopting the meridian of Villa de Cura (67° 30` west longitude) as the first geographical reference for a national time system, the HLV began to provide the Central Office of National Telegraphs with astronomical determinations of local time, and then to conform to local time GMT-4:30. UTC − 04:30 was once the official time zone in Venezuela from 1912 to 1965, when the government changed it to take over the meridian 60°UTC − 04:00 that runs through Punta de Playa in the state of Delta Amacuro. Replaced by UTC − 04:30 from 2007 to 2016. In 1965, by order of the National Congress, it was designated as the official meridian to establish the HLV, which corresponds to the geographical longitude of 60 ° W, near the city of Punta de Playa (Edo. Delta Amacuro). Thus, Venezuela is officially included in international regulations regarding the establishment of time systems with complete differences from the Greenwich meridian. From 1968, the Cagigal Observatory began to transmit the hourly signal of the mean time daily in radio form, modulated to the frequency of 6,100 kHz. In 1989, this frequency was changed to 5,000 kHz, so that the transmission of HLV remained in the internationally protected frequency range for these purposes. In 1981, two HP5061-A clocks were put into operation, regulated by atomic cesium patterns and guaranteeing one second of error every 3,000 years, a dual ZAG-100 talk time system, a frequency splitter, a satellite signal time receiver (GOES) that transmits time calibration by astronomical instruments, and a time controller in the background. 1972 The Paris-based Bureau International du Temps (BIPM), La France, recognizes HLV as one of the agencies responsible for transmitting standard frequency and time signals, and is the only one in South America that performs continuous transmission. On August 11, 1988, the Juan Manuel Cagigal Observatory was the body exclusively responsible for the dissemination of legal time throughout the national territory, in accordance with Administrative Decree No.
2306. In 2004, the following devices were purchased: Two atomic clocks of the Agilent Technology Model 5071-A with one second of error every 1.6 million years. Two hours of IDAS-Atis digital speakers, controlled by a Meinberg model 167 GPS satellite receiver. A Voltek frequency splitter, intelligent VK-100B model, which receives the calibration frequency via atomic clocks for adjustment. A computer-controlled unit from Samsung to control two-hour digital speakers. A UPS Master Guard system to ensure the power supply of all equipment for a period of six (06) hours without interruption. At the end of 2007, the Presidency of the Bolivarian Republic of Venezuela was reformed in accordance with Decree No. 5,693 with the rank of value and strength of the law of partial reform of the Metrology Law, motivated by the incessant struggle for the well-being of the people, the only article in Chapter III Legal time to adopt the time zone of minus four hours thirty minutes compared to the UTC meridian (time universal coordinated). this corresponds to the meridian sixty-seven degrees thirty minutes (67º 30`), which corresponds to the Villa de Cura sector, and therefore thirty (30) minutes have been deduced from the legal time of this time, changing the time zone adopted throughout the national territory from 1 January 1965 to 9 December 2007, which was less than four hours in relation to the main meridian (UTC), determined by the sixty-degree (60º) time zone that makes up the Punta de Playa (Edo. Delta Amacuro). As early as 1930, radio services broadcast time synchronously with the HLV service.
In 1939, tests began on the transmission of time by two radio stations with national coverage: Radio Broadcasting Caracas and Radio Difusora Venezuela, which assumed mechanisms of temporal synchronization with the HLV service using telegraph systems, while the procedures for determining and adjusting local and sidereal time remained almost intact until the 1950s. In 1959, the installation of the first quartz watches of unprecedented precision for the time began (a second error every 30 years), whose absolute calibration was systematically carried out from astronomical observations of selected stars. This true “quantum technological leap” was completed by the integration of an automatic announcement of the time by telephone and the inauguration of the standard frequency service for technical applications. 30 minutes were deducted from the statutory deadline of 9 December 2007. [5] Therefore, the current HLV service was equivalent to UTC-4:30. [6] Atlantic Standard Time (AST) or Atlantic Time is a geographic region that corresponds to the official time zone four hours less than Coordinated Universal Time (UTC), specifically UTC-4. Venezuela`s legal time service was created in response to the need for a standard time throughout the country, located approximately between the meridians 60 ° W and 75 ° W, corresponding to UTC − 04:00 and UTC − 05:00 relative to the prime meridian. In 1912, the meridian 67°30` W was adopted as the first geographical reference for a national time system. The HLV was delivered to the National Central Telegraphy Bureau as an astronomical time standard, corresponding to GMT − 04:30. In the 1930s, broadcasting services introduced synchronized time ratios with HLV.
In 1965, the Congress of the Republic of Venezuela officially established the 60°W meridian near Punta de Playa in the state of Delta Amacuro, because the previous one did not meet the international requirement of time standards, which must be based on entire differences with the GMT. After that, Venezuela`s standard time was UTC − 04:00; That meant adding thirty minutes more than the previous time. [2] This amendment was made on the basis of an investigation conducted by Compañía La Electricidad de Caracas (Caracas Electricity). [ citation needed ] The results showed that adding thirty minutes to the previous time would save energy as all morning activities would be performed in the presence of sunlight and there would be an additional half hour of sun in the afternoon. Since Venezuela`s legal time service did not comply with international regulations for the establishment of time systems with complete differences from the Greenwich mean time, the Congress of the Republic at the time approved on 9 December 1964 the Law on Measures and its Implementation, article 27 of which established as the official meridian the geographical longitude 60º W (Eastern Time). near Punta Playa promontory in Delta Amacuro state, meaning the previous reference time has been extended by 30 minutes.